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All Journal Jurnal Periodic Jurusan Kimia UNP Jurnal Riset Kimia Jurnal Penelitian Pendidikan IPA (JPPIPA) Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan JURNAL PENDIDIKAN TAMBUSAI Sainstek : Jurnal Sains dan Teknologi REACTOR : Journal of Research On Chemistry And Engineering Journal of Natural Sciences CHEDS: Journal of Chemistry, Education, and Science Journal of Educational Sciences YASIN: Jurnal Pendidikan dan Sosial Budaya MASALIQ: Jurnal Pendidikan dan Sains Jurnal Teknik Terapan (J-TETA) Chimica Didactica Acta : Journal of Chemistry and Chemistry Education Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Molekul: Jurnal Ilmiah Kimia Jurnal Pendidikan MIPA IJIS Edu : Indonesian Journal of Integrated Science Education
Hardeli Hardeli
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka, Padang
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Optimization of P3HT:PCBM Bulk Heterojunction Polymer Solar Cells: Effects of Annealing Temperature and Active Layer Composition Hardeli, Hardeli; Sanjaya, Hary; Harahap, Riri Indah Nitami; Permatasari, Putri
Jurnal Riset Kimia Vol. 16 No. 2 (2025): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i2.817

Abstract

P3HT:PCBM-based polymer solar cells have demonstrated potential as an affordable substitute for conventional silicon-based photovoltaics. The performance of P3HT:PCBM bulk heterojunction solar cells is examined in this work in relation to the annealing temperature and the composition of the active layer. The morphology of the active layer was characterized using SEM, while the electrical properties were measured using current-voltage (I-V) characterization. Our findings show that 150°C is the ideal annealing temperature, resulting in the maximum power conversion efficiency (PCE) of 2.58%. SEM analysis revealed that this temperature produces the most homogeneous surface morphology. Additionally, a P3HT:PCBM ratio of 3:1 resulted in the best device performance, with a PCE of 4.36%. Short-circuit current and open-circuit voltage increase when the blend's P3HT level increases. These results offer important information for optimizing the production of P3HT:PCBM-based polymer solar cells, which could lead to increased organic photovoltaic device efficiency and possible commercial outcomes.
Optimization of Tannic Acid Polymerization to Improve the Efficiency of Dye-Sensitized Solar Cells: Effect of Temperature and Monomer Concentration Agustini, Dwi; Hardeli, Hardeli; Oktavia, Budhi; Permatasari, Putri
Jurnal Riset Kimia Vol. 16 No. 2 (2025): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i2.823

Abstract

This study investigates the effects of temperature and monomer concentration on tannic acid polymerization to enhance dye-sensitized solar cell (DSSC) efficiency. Tannic acid was polymerized using Trimethylolpropane Triglycidyl Ether (TMPGDE) as a crosslinker, with monomer concentrations of 2, 2.5, and 3 grams and temperatures ranging from 30°C to 110°C. UV-Vis analysis revealed a bathochromic shift in poly-tannic acid, indicating increased light absorption in the 200-800 nm range. FTIR confirmed the formation of new ether groups, signifying successful polymerization. The highest DSSC efficiency (8.984%) was achieved with 2.5 grams of monomer at 50°C, significantly outperforming unpolymerized tannic acid (1.35%). The optimal poly-tannic acid has an average molecular weight of 32,610.1568 and a polymerization degree of 19.182. This research demonstrates the potential of tannic acid polymerization for improving DSSC performance, paving the way for more efficient and cost-effective organic solar cells.
Validity of E-Module Based on Problem Based Learning Integrated Demonstration Video and Science Literacy Aulia, Annisa; Hardeli, Hardeli
IJIS Edu : Indonesian Journal of Integrated Science Education Vol 4, No 1 (2022): January 2022
Publisher : UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/ijisedu.v4i1.6497

Abstract

The time of mechanical insurgency 4.0 is a period of digitalization in different areas particularly within the field of instruction so it takes educating fabric that can increment understudy movement in learning. This type of research is educational design research using the Plomp model. This model consists of three steps: (1) preliminary research, (2) prototyping, and (3) assessment phase. The research instrument used observation sheets, questionnaires, and learning outcomes tests. The e-module was validated by six construct experts and three content experts. This inquires about points to create an e-module of electrolyte and nonelectrolyte solutions based on problem-based learning integrated demonstration videos and scientific literacy and decide the level of validity of created e-module. This sort of investigation is instructive plan inquire about utilizing the plomp model. The appraisal rebellious utilized were perceptions sheets, surveys, and learning results tests. The e-module was approved by five validators, to be specific the build validator and the substance validator. The comes about of the validity of the e-module develop gotten Aiken’s V normal esteem of 0.85 with a substantial category, and the validity of the e-module substance gotten a normal CVI esteem of 1 with a substantial category. Based on the results of the study, it was concluded that the problem-based learning e-module of electrolyte and nonelectrolyte solutions integrated with demonstration videos and scientific literacy developed was valid.
Peningkatan Efisiensi Poli Tanin Sebagai Dye Pada Dye Sensitized Solar Cell Menggunakan Crosslinker Glutaraldehyde Subriadi, Hanifah Putri Indah; Hardeli, Hardeli
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 1 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i1.72

Abstract

Dye Sensitized Solar Cell (DSSC) is the latest generation of solar cells with dyes as absorbers of photons from sunlight. At this time, the DSSC efficiency obtained is still relatively low so that research on DSSC is still being developed to produce DSSC with higher efficiency. One of the methods used to increase the efficiency of DSSC is polymerization of dyes. Polymerization of dyes aims to increase conjugated double bonds. The more conjugated double bonds, the more photons will be absorbed so that more electrons will flow. In this study, tannins were used as dyes. In the tannin polymerization process, crosslinking agents are used to bind tannin monomers with other tannin monomers. the variable in this study was the volume of the glutaraldehyde crosslinking agent (1.5 mL, 2.5 mL, 3 mL). The results of this study obtained the highest DSSC efficiency of 12.20% at a volume of 2.5 mL of crosslinking agent.
Pengaruh Massa Sodium Dodecyl Sulfate terhadap Nilai Bandgap Semikonduktor TiO₂-ZnO Adha, Valen Febri; Ningsih, Sherly Kasuma Warda; Hardeli, Hardeli
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6696

Abstract

Modification of the TiO₂-ZnO semiconductor through the addition of Sodium Dodecyl Sulfate (SDS) has been carried out to reduce the bandgap energy using the sol-gel method. The SDS mass variations used in the synthesis process were 0.015, 0.020, 0.025, 0.030, and 0.035 grams. The synthesized samples were characterized using UV-Vis Diffuse Reflectance Spectroscopy (DRS) to determine the bandgap values. The characterization results showed that the addition of 0.025 grams of SDS produced the lowest bandgap value, measured at 3.16 eV. This reduction in bandgap is attributed to changes in the material's physical and chemical surface structure, influenced by the interaction between the surfactant and the TiO₂-ZnO surface, microstructural alterations, and modifications in crystallinity. However, at higher SDS concentrations (≥0.025 grams), the bandgap value increased again, due to particle agglomeration and hindered electron transfer. These findings indicate that the addition of SDS surfactant within an optimal range can enhance the optical properties of semiconductor materials, while excessive addition may degrade performance due to undesirable morphological changes.
Pengaruh Kecepatan Pengadukan ZnO sebagai Lapis Ganda pada Semikonduktor TiO₂-ZnO terhadap Nilai Efisiensi Dye Sensitized Solar Cell Saputra, Dihan Kurnia; Ningsih, Sherly Kasuma Warda; Hardeli, Hardeli
MASALIQ Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i5.6949

Abstract

This study aims to evaluate the efficiency of dye-sensitized solar cells (DSSC) by varying the stirring speed during the synthesis of ZnO as a double layer on the TiO₂-ZnO/SDS (Sodium Dodecyl Sulfate) semiconductor structure. The research is grounded in the importance of optimizing semiconductor structures to enhance solar energy conversion efficiency. The sol-gel method was used to synthesize ZnO at stirring speeds of 300, 600, 900, 1200, and 1500 rpm. DSSC fabrication was conducted using the doctor blade method with poly tannic acid as the dye. The operating principle of DSSC relies on photon absorption by the dye, where excited electrons are injected into the semiconductor. Efficiency measurements were carried out using a multimeter to obtain voltage and resistance values. The results showed that the highest efficiency of 0.174% was achieved at a stirring speed of 1200 rpm. This finding indicates that stirring speed during ZnO synthesis affects the morphology of the semiconductor, thereby influencing the photon-to-energy conversion efficiency of the DSSC. This study contributes to the development of more efficient DSSCs based on double-layer semiconductor structures through the control of synthesis parameters. Keywords: Semiconductor; ZnO; TiO₂-ZnO; SDS; DSSC
Pengaruh Waktu Kontak dan Kecepatan Pengadukan dengan Metode Batch Terhadap Penyerapan Zat Warna Methyl Orange Pada Biji Kelengkeng Frista, Nada; Kurniawati, Desy; Dewata, Indang; Hardeli, Hardeli
Jurnal Pendidikan Tambusai Vol. 8 No. 1 (2024): April 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i1.14250

Abstract

Methyl orange merupakan salah satu zat warna yang sering dimanfaatkan dalam industri tekstil maupun kegiatan laboratorium, Zat warna ini tergolong kedalam zat warna anionik dengan ambang batas berkisar 5-10 mg/L dalam perairan, untuk mengurangi limbah zat warna ini perlu dilakukan beberapa upaya, salah satunya yaitu adsorpsi dengan metode batch. Pada pengujian ini memanfaatkan biji kelengkeng sebagai adsorbenya yang telah teraktivasi dengan HNO3 0,01 M untuk menyerap zat warna Methyl orange. Pemilihan biji kelengkeng sebagai adsorben ini didasarkan karena mengandung gugus fungsi yang telah terindentifikasi pada hasil spektrum FTIR seperti O-H, C-H, C=O, dan C-O gugus fungsi ini yang dapat mengikat zat warna Methyl orange. Dari hasil penelitian ini didapatkan nilai kapasitas penyerapan sebesar 4,63 mg/g dalam keadaan optimum proses adsorpsi pada pH 3, konsentrasi larutan Methyl Orange 80 ppm, ukuran partikel 150 ?m, waktu kontak 150 menit dan kecepatan putaran pengadukan 200 rpm yang terukur menggunakan spektrofotometer UV-Vis pada panjang gelombang 465 nm.
Validasi E-Modul Larutan Penyangga Berbasis PBL dalam Menunjang Pembelajaran Berdiferensiasi untuk Kelas XI Fase F SMA/MA Afifah Novita Sri Lathifah; Hardeli, Hardeli
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Materi larutan penyangga merupakan materi yang sulit dipahami sehingga peserta didik memerlukan suatu bahan ajar yang dapat membuat peserta didik belajar sesuai dengan gaya belajarnya. Salah satu bahan ajar yang dapat dikembangkan berupa e-modul dengan menggunakan model PBL. Model PBL digunakan agar dapat membantu peserta didik untuk dapat berpikir secara kritis dan kreatif dalam memecahkan permasalahan yang ditemuinya di dunia nyata. Penelitian ini memiliki tujuan untuk mengembangkan bahan ajar yang dapat menjadikan peserta didik berpikir kreatif dan kritis serta menunjang gaya belajar peserta didik. Sehingga dikembangkan e-modul materi larutan penyangga berbasis PBL dalam menunjang pembelajaran berdiferensiasi untuk fase f SMA/MA dengan menggunakan model pengembangan plomp. Pada uji validasi e-modul didapatkan validasi e-modul sebesar 0,91 masuk dalam kategori valid.
Pengembangan Modul Pembelajaran Berbasis Problem Based Learning pada Materi Nanoteknologi Fase E SMA/MA Al Hamdi, Fuad; Hardeli, Hardeli
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Nanoteknologi merupakan materi pembelajaran baru pada kurikulum merdeka fase E SMA/MA semester ganjil. Berdasarkan penyebaran angket kepada peserta didik dan wawancara kepada guru di 3 SMA negeri di Kota Padang didapat permasalahan bahwa peserta didik sulit memahami materi kimia khususnya materi nanoteknologi dan bahan ajar untuk materi nanoteknologi masih sedikit. Penelitian ini bertujuan untuk menghasilkan modul pembelajaran berbasis problem based learning pada materi nanoteknologi fase E SMA/MA yang valid dan praktis untuk memudahkan peserta didik memahami materi nanoteknologi. Metode penelitian yang dilakukan adalah penelitian Educational Design Research (EDR) model plomp. Subjek penelitian ini adalah dosen kimia UNP, guru kimia SMA N 2 Padang dan Peserta didik SMAN 2 Padang. Jenis data pada penelitian ini adalah data primer dan dikumpulkan menggunakan angket validitas dan lembar praktikalitas. Data hasil validitas dianalisis menggunakan rumus Aiken’s V, sedangkan data praktikalitas dianalisis dengan menentukan presentase praktikalitas dari perbandingan jumlah skor responden dengan jumlah skor maksimal.
Validasi LKPD Berbasis GDL pada Materi Termokimia untuk Fase F SMA/MA Imelda, Fitria; Hardeli, Hardeli; Suryani, Okta
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Materi termokimia adalah salah satu topik pembelajaran yang sulit untuk dipelajari peserta didik sehingga diperlukan bahan ajar yang dapat membantu peserta didik untuk menguasai materi ini. Salah satu bahan ajar yang bisa dikembangkan yaitu Lembar Kerja Peserta Didik (LKPD) berbasis GDL. Model GDL diterapkan untuk melatih peserta didik dalam menemukan konsep secara mandiri dan membantu peserta didik dalam memperoleh keterampilan berpikir tingkat tinggi. Tujuan dari penelitian ini adalah untuk mengembangkan bahan ajar dalam bentuk LKPD yang diharapkan mampu meningkatkan antusiasme peserta didik dalam belajar dan mengembangkan kemampuan berpikir kritis mereka. Dengan menggunakan model pengembangan plomp, dikembangkan LKPD berbasis GDL pada materi termokimia untuk mendukung proses pembelajaran menggunakan kurikulum merdeka pada fase F kelas XI SMA/MA. Uji validitas yang dilakukan pada LKPD didapatkan nilai validitas LKPD sebesar 0,9 dengan kategori valid.
Co-Authors Ade Putri, Anisa Adha, Valen Febri Afifah Novita Sri Lathifah Agdisti, Nurul Fadilah Al Hamdi, Fuad Amanda, Vira Angreni, Siska Anna Maulina Asrizal Aulia, Annisa Bahrizal Bahrizal Budhi Oktavia Darmanella Dian Eka Wati Destari, Mutya Desy Kurniawati Dewanto Dewanto Dwi Agustini, Dwi Dwi Finna Syolendra Dwi Putri, Vika Trisna Edi Nasra Elfiza, Rizma Ernica, Santri Yuli Feronika, Widi Fisyabilillah, Dea Fitri, Bali Yana Frista, Nada Gusmar Lina, Resi Harahap, Riri Indah Nitami Hary Sanjaya Hijri, Fadhillah Ideal, Flami Luthfianisa Imelda, Fitria Indang Dewata Jayawarsa, A.A. Ketut Karmila, Aroma Khairanisa, Ayudia Lasmana, Oria Lufri Lufri Luli, Rahmaneta Meilan, Adinda Mohtar, Lilia Ellany Muhammad Farhan Nabilah, Hafizah Nizar, Umar Kalmar Nofriyanti, Desi Novita, Indri Panca Novita, Rani Pernadi, Niza Lian Putri Permatasari, Putri Putri, Ike Erlanda Putri, Tiara Dwi Putri, Yollanda Prissila Rahadian Zainul Rahmi, Fathaniah Raviqa Ratih Komala Dewi Ratih, Arista Retno Damayanti Riga, Riga Risty, Chika Mei Rizki, Suci Yulia Sabrina, Joya Santosa, Tomi Apra Saputra, Dihan Kurnia Sari*, Rona Taula Sherly Kasuma Warda Ningsih Sidiq, Aqil Marsya Subriadi, Hanifah Putri Indah Suryani, Okta Susanti, Melly Umayya, Dian Regina Yunita, Lasmi