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All Journal POSITRON Jurnal Rekayasa Mesin AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat IJEMS (Indonesian Journal of Environmental Management and Sustainability) Jurnal Elektronika dan Telekomunikasi UPEJ Unnes Physics Education Journal Al-Ard: Jurnal Teknik Lingkungan Journal of the Indonesian Medical Association : Majalah Kedokteran Indonesia Reswara: Jurnal Pengabdian Kepada Masyarakat
Widianto, Eri
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences

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Desain dan Simulasi Sel Surya Perovskite Berbasis CH3NH3SnI3 Menggunakan Graphene Oxide sebagai Material Pengangkut Hole Widianto, Eri; Hanifi, Rizal; Kardiman, Kardiman; Efelina, Vita
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.3205

Abstract

Material perovskite menarik perhatian peneliti dibidang fotovoltaik karena fabrikasi mudah, sifat optoelektronik yang baik, mobilitas elektron tinggi, dan peningkatan efisiensi yang sangat signifikan dari 3.8 % pada tahun 2009 menjadi 25.5% pada tahun 2021. Namun, penggunaan logam Pb yang bersifat racun serta penggunaan material pengangkut hole (hole transport materials, HTM) yang mahal menjadi tantangan dalam pengembangan sel surya perovskite dalam skala besar. Penelitian ini bertujuan untuk mensimulasikan sifat-sifat fundamental pada sel surya perovskite tanpa Pb (lead-free) dengan CH3NH3SnI3 sebagai lapisan aktif dan graphene oxide (GO) sebagai HTM menggunakan Solar Cell Capacitance Simulator (SCAPS). Pada simulasi ini, analisis tentang pengaruh ketebalan perovskite dan interface defect perovskite/HTM terhadap karakteristik sel surya perovskite telah dilakukan. Hasil penelitian sel surya perovskite dengan konfigurasi FTO/TiO2/CH3NH3SnI3/GO/Au menunjukkan kinerja optimal dengan JSC = 31.64 mA/cm2, VOC = 0.813 V, FF = 74.76 % dan PCE = 19.25 %. Hasil penelitian ini dapat digunakan untuk memperkirakan parameter penting dalam optimasi sel surya perovskite tanpa Pb menggunakan GO sebagai HTM. Selanjutnya, studi pemodelan ini memberikan informasi penting dalam memilih parameter material untuk pengembangan sel surya perovskite yang efisien dan dengan biaya rendah.
Desain dan Pengembangan Prototipe Chamber Zat Radioaktif Otomatis sebagai Alat Eksperimen Spektroskopi Gamma Menggunakan Mikrokontroler Arduino Uno R3 Driyo, Cipto Driyo; Fahrudin, Adinandra Caesar; Kurniawan, Yan Hendra; Riswan, Muhammad; Widianto, Eri
UPEJ Unnes Physics Education Journal Vol 12 No 3 (2023): Vol 12 No 3
Publisher : UPEJ Unnes Physics Education Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/upej.v13i1.74090

Abstract

Prototipe chamber zat radioaktif otomatis dilengkapi dengan sistem robotik telah berhasil dikembangkan dan diimplementasikan sebagai alat penunjang eksperimen fisika nuklir pada spektroskopi gamma. Prototipe ini terdiri dari chamber otomatis yang digunakan untuk mengukur spektrum zat radiasi, dinding chamber yang berfungsi sebagai penahan bahaya radiasi serta robot pemindah barang yang dipasang di dalam chamber. Mikrokontroler arduino uno R3 digunakan sebagai kontroler utama yang digunakan untuk mengatur pergerakan robot, fleksibilitas dan kemudahan dalam mengendalikan seluruh sistem di dalam chamber. Robot pemindah barang diprogram untuk memindahkan detektor dan sampel zat radioaktif secara presisi sesuai dengan posisi yang diinginkan. Selama praktikum menggunakan spektroskopi gamma, prototipe ini memudahkan mahasiswa dalam pengaturan sampel, efisiensi waktu praktikum dan biaya pembelian alat penunjang, meminimalisir bahaya paparan zat radioaktif serta menghilangkan resiko bahaya mekanik akibat terjepit shielding pembatas pada chamber manual. Penggunaan prototipe ini memberikan pengalaman praktikum yang lebih interaktif, efisien serta pemahaman mendalam tentang prinsip-prinsip spektroskopi gamma sambil mengembangkan keterampilan pemrograman dan pengendalian sistem bagi mahasiswa. Selain itu, pengembangan sistem lebih lanjut dari prototipe ini dapat melibatkan peningkatan fungsionalitas sistem robotik untuk mengakomodasi praktikum yang lebih kompleks dan variasi pengaturan eksperimen.
Colloidal TiO2-Modified Mesoporous Electron Transport Layer in Perovskite Solar Cells Yustiani, Evira Bella; Anggraini, Putri Nur; Shobih, Shobih; Widianto, Eri; Retnaningsih, Lilis; Soepriyanto, Syoni; Santoso, Imam; Nursam, Natalita Maulani
Jurnal Elektronika dan Telekomunikasi Vol 23, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.599

Abstract

The electron transport layer (ETL) is a crucial part in perovskite solar cells (PSC) as it specifically governs the charge extraction at the perovskite/ETL interface. In this study, methylammonium lead iodide-based PSCs with an n-i-p structure were fabricated and modified by adding colloidal TiO2 into the mesoporous TiO2 film as ETL. The effect of the colloidal TiO2 addition on the PSC performance was investigated for ETL comprising different types of TiO2 particles, i.e. P25 and anatase TiO2. Despite producing lower performance than the PSC made with commercial paste, the power conversion efficiency of the PSCs could be improved with the introduction of colloidal TiO2 solution. An optimum condition was observed depending on the type of TiO2 particle, where the best performing device was achieved with colloidal TiO2 of 0.4 and 0.2 mL for P25 and anatase TiO2, respectively. The amount of colloidal TiO2 in samples with P25 overall had less impact than the samples with anatase TiO2.
Effect of Doping Density and Parasitic Resistances on The Performance of Perovskite Solar Cells-based Graphene Oxide as Hole Transport Layer by SCAPS-1D Fauji, Najmudin; Kardiman, Kardiman; Suci, Farradina Choria; Hakim, Muhammad Fahmi; Efelina, Vita; Widianto, Eri
POSITRON Vol 14, No 2 (2024): Vol. 14 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i2.74606

Abstract

Perovskite solar cells (PSCs) have demonstrated remarkable improvement and promise to be produced as large-scale, low-cost devices. Several resistive losses, such as the loss current, the trapping, and the recombination of charge carriers, significantly inhibited the performance of PSCs. Typically, the series resistance (RS) and shunt resistance (RSH) of the devices influence these kinds of losses. In this study, we conduct a simulation analysis to investigate the effect of doping density and parasitic resistances (RS and RSH) on the performance of PSCs-based graphene oxide (GO) as a hole transport layer (HTL) using the SCAPS-1D. The doping density variations in HTL demonstrate improved power conversion efficiency (PCE) and fill factor (FF) as the doping density increases. Both RS and RSH significantly affect the PSC performance, as they control the shape and slopes of the current density (J-V) characteristic. The optimization method produced impressive results, including an open-circuit voltage of 0.94 V, a short-circuit current density of 22.51 mA.cm−2, a fill factor of 78.92%, and a power conversion efficiency of 16.75%. This study leads to a basic understanding of the physics of PSC devices. The proposed design provides a systematic analysis method for photovoltaic science and technology.
Pencegahan Dampak Negatif Paparan Pestisida dari Aktivitas Pertanian Melalui Kegiatan Edukasi dan Sosialisasi Rahmat, Natasya Shafira Putri; Umam, Hilman Imadul; Mahendra, Bhisma; Widianto, Eri; Yuliasari, Fitri; Aeni, Alfieta Rohmaful; Nuraini, Umi; Fauji, Najmudin; Sobur, Susilawati; Wilda, Saniatun; Hasanah, Putri Nur
Reswara: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 1 (2025)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v6i1.5280

Abstract

Desa Telukambulu di Kecamatan Batujaya, Kabupaten Karawang, memiliki luas wilayah lahan pertanian sawah sebesar 84%, hal ini menjadi tantangan para petani dalam pengelolaan pestisida. Penggunaan pestisida yang tinggi akan memberikan dampak negatif pada lingkungan dan kesehatan masyarakat. Data menunjukkan bahwa 41,7% petani di Desa Telukambulu tergolong dalam kelompok lanjut usia. Oleh karena itu, sangat penting untuk meningkatkan pemahaman para petani tentang Keselamatan dan Kesehatan Kerja (K3) dalam penggunaan pestisida. Edukasi K3 serta sosialisasi menggunakan media promosi kesehatan dilakukan untuk mencegah dampak negatif paparan pestisida. Hasil kegiatan menunjukkan bahwa pada saat pretest, pemahaman responden terkait penggunaan pestisida hanya mencapai 36%. Namun, setelah dilakukan sosialisasi, terjadi peningkatan signifikan,dengan rata-rata nilai postest mencapai lebih dari 90%. Peningkatan tersebut mencerminkan pemahaman petani yang lebih memperhatikan aspek K3 dalam penggunaan pestisida. Perubahan ini diharapkan dapat menjadikan para petani sebagai agen perubahan yang berperan dalam pengelolaan pestisida yang berkelanjutan dalam pelestarian lingkungan. Pada akhirnya hal ini akan membentuk masyarakat yang lebih peka terhadap dampak pestisida, mendukung praktik pertanian yang lebih aman, serta mengurangi risiko bagi kesehatan.
Hubungan Persentase Lemak Tubuh dengan Nilai V̇O2 Maks Penerbang TNI AU Widianto, Eri; Wibawanti, Retno; Mulijadi, Herman; Widyahening, Indah Suci; Isbaniah, Fathiyah; Sinabutar, Klara; Kekalih, Aria
Majalah Kedokteran Indonesia Vol 73 No 5 (2023): Journal of The Indonesian Medical Association - Majalah Kedokteran Indonesia, Vo
Publisher : PENGURUS BESAR IKATAN DOKTER INDONESIA (PB IDI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47830/jinma-vol.73.5-2023-1030

Abstract

Introduction: Military pilots require good cardiorespiratory fitness due to the need to perform tasks in difficult and varied environmental conditions. Cardiorespiratory fitness is usually expressed in terms of maximal oxygen consumption (V̇O2 max). It is important to know the factors associated with V̇O2 max in order to maintain the fitness of Indonesian Air Force pilots. This study was conducted to assess the association between body fat percentage with V̇O2 max of Indonesian Air Force pilots.Methods: A cross-sectional study was conducted on active Indonesian Air Force pilots who carried out periodic medical examinations from October to November 2022 at Lakespra dr. Saryanto, Jakarta. The research subjects underwent body composition examinations using Bioelectrical Impedance Analysis (BIA), and V̇O2 max assessment was conducted using the Bruce protocol. The association between body fat percentage and V̇O2 max value was assessed by Pearson’s correlation test.Results: Of the 64 subjects analysed, the average value of V̇O2 max was 44.6±6.2 ml/kg/min and the average body fat percentage was 23.4±5.0 %. There is a significant correlation between body fat percentage and V̇O2 max. (r=-0.334; p=0.007)Conclusion: There is a significant negative correlation with moderate strength between the body fat percentage and the V̇O2 max of Indonesian Air Force pilots who carried out medical examination at Lakespra dr. Saryanto.
Pemberdayaan Masyarakat tentang Pemanfaatan Tanaman Saga (Abrus Precatorius L) di Desa Tanahbaru Pakisjaya Karawang Widianto, Eri; Santoso, Dian Budhi; Kardiman, Kardiman; Nugraha, Asep Erik
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 4 No 1 (2020): Februari
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v4i1.2294

Abstract

ABSTRAKTanaman obat saat ini banyak digunakan baik sebagai obat dan perawatan kesehatan. Tanaman obat menjadi sumber bahan baku penting yang sebelumnya belum diketahui kandungan kimianya. Tanaman Saga (Abrus Precatorius L) banyak ditemukan di Indonesia seperti di Desa Tanahbaru, Pakisjaya, Karawang. Tanaman Saga banyak mengandung flavonoid, terpenoid, tanin, alkaloid dan saponin. Tanamn Saga dapat digunakan sebagai antiseptik, anti virus, anti malaria dan anti fertilitas. Pada kegiatan ini bertujuan untuk pemberdayaan masyarakat Desa Tanahbaru tentang pemanfaatan tanaman Saga. Kegiatan ini dilakukan dengan evaluasi kegiatan awal, sosialisasi, pendampingan dan evaluasi akhir kegiatan.Kata Kunci: pemberdayaan; tanaman Saga; tanaman obat. ABSTRACT Medicinal plants are being used as a drug and health care delivery system. Medicinal plants can be important source of previously unknown chemical substances. Saga (Abrus Precatorius L) abundantly found in Indonesia such as in Tanahbaru village, Pakisjaya, Karawang. Saga principally contains falvonoids, terpenoid, tanin, alkaloids dan saponin. It have been for antiseptic, anti-viral, anti-malarial, and antifertility. This activity aims to community empowerment in Tanahbaru village about Saga plants. Activities are conducted by initial evaluation of activities, socialization, assistance and final evaluation activities.Keywords: empowerment; medicinal plants; Saga plants. 
Photocatalytic Degradation of Diazinon in Aqueous Solutions Using ZnO Under Visible Light Irradiation: An Advanced Oxidation Process Approach Umam, Hilman Imadul; Pambudi, Teguh; Widianto, Eri; Yuliasari, Fitri; Putri, Fajar Amelia Rachmawati; Nandira, Rantika Sekar; Utami, Marsah Rahmawati
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 3 (2025): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.3.105-114

Abstract

Diazinon is a commonly used organophosphate insecticide in agriculture, but its persistence in water and soil presents significant health and environmental concerns. This study investigates the photocatalytic removal of diazinon from aqueous solutions using zinc oxide (ZnO) nanoparticles activated by visible light irradiation. ZnO was chosen due to its excellent photocatalytic properties, including a direct band gap (~3.1 eV), strong oxidative capability, chemical stability, and non-toxic nature, making it a superior candidate for visible-light-driven environmental remediation. Photocatalytic degradation under sunlight was also assessed for comparison. Key operational parameters, such as photocatalyst dosage, solution pH, initial diazinon concentration, and irradiation time, were systematically optimized. The highest degradation efficiency degradation was achieved with 20 mg of ZnO, neutral pH, 30 mg/L an initial concentration, and 60 minutes of irradiation. Kinetic analysis revealed that the process followed zero-order reaction kinetics (k = 1.118; R2 = 0.9962). Notably, visible light irradiation was more effective than sunlight in degrading diazinon. These findings provide important details about the potential of ZnO nanoparticles as an efficient, low-cost, and environmentally friendly photocatalyst for remediating pesticide-contaminated water under sustainable energy conditions.
PEMANFAATAN SAMPAH PLASTIK DAN ORGANIK DALAM PEMBUATAN PAVING BLOCK MENGGUNAKAN MESIN PRESS Ubaidillah, zacky; Sumarjo, Jojo; Widianto, Eri; Hanifi, Rizal
Al-Ard: Jurnal Teknik Lingkungan Vol. 4 No. 2 (2019): March
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v4i1.412

Abstract

Research has been done on the manufacture and testing of paving blocks with plastic and organic waste materials using a press machine. The purpose of this study is to determine the compressive strength of paving blocks and as a solution for handling waste around us. The results of manual making paving block research with 100% plastic waste, the highest value was 110.4 kg/cm2 and the lowest was 42.2 kg/cm2 and the highest organic mixture was 99.8 kg/cm2 and the lowest was 56.0 kg/cm2. Whereas in the masinal pembutan produce value with 100% plastic waste 113,9 kg/cm2 the lowest value 78,4 kg/cm2. Paving blocks with plastic waste materials are in accordance with SNI quality qualifications. Keywords: plastic waste, organic mixture, paving block, hard test press, machine press.
Co-Authors Aeni, Alfieta Rohmaful Anggraini, Putri Nur Aria Kekalih Driyo, Cipto Driyo Efelina, Vita Fahrudin, Adinandra Caesar Hakim, Muhammad Fahmi Hanifi, Rizal Hasanah, Putri Nur Herman Mulijadi Imam Santoso Indah S. Widyahening Isbaniah, Fathiyah Kardiman, Kardiman Kurniawan, Yan Hendra Mahendra, Bhisma Marsah Rahmawati Utami Najmudin Fauji Nandira, Rantika Sekar Nugraha, Asep Erik Nursam, Natalita Maulani Putri, Fajar Amelia Rachmawati Rahmat, Natasya Shafira Putri Retnaningsih, Lilis Retno Wibawanti Riswan, Muhammad Santoso, Dian Budhi Shobih Shobih Sinabutar, Klara Sobur, Susilawati Suci, Farradina Choria Sumarjo, Jojo Syoni Soepriyanto Teguh Pambudi, Teguh Ubaidillah, zacky Umi Nuraini, Umi Wilda, Saniatun YULIASARI, FITRI Yustiani, Evira Bella