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Edi Supriyanto
Departement of Physics, UNEJ, Jember
Religion Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Health Professions Mathematics

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GaN-based Double-hetero Film Grown and Fabricated on (0001) Sapphire Substrates by Plasma-assisted MOCVD Heri Sutanto; Edi Supriyanto; Maman Budiman; Pepen Arifin; Sukirno Sukirno; Mohamad Barmawi
Jurnal Matematika & Sains Vol 10, No 2 (2005)
Publisher : Institut Teknologi Bandung

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Abstract

GaN-based double-hetero film has been grown on (0001) sapphire substrate by plasma-assisted MOCVD method. The structure of film was n-GaN/Al0.25Ga0.75N/In0.3Ga0.7N/Al0.25Ga0.75N/p-GaN. A photoluminescence (PL) peak originating from InGaN active layer has been observed at room temperature, which produced emission wavelength of 453 nm corresponded to energy of 2.74 eV. However, broadening of the peak caused by the crystalline quality of the InGaN epilayer is still poor, which is related with fluctuation of In rich regions.
Karakteristik Struktur dan Listrik Film Tipis GaN yang Ditumbuhkan di atas Substrat Si(111) dengan Metode Plasma Assisted-Metalorganic Chemical Vapor Deposition (PA-MOCVD) Heri Sutanto; Agus Subagio; Edi Supriyanto; Pepen Arifin; Sukirno Sukirno; Maman Budiman; Mohamad Barmawi
Jurnal Matematika & Sains Vol 11, No 1 (2006)
Publisher : Institut Teknologi Bandung

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Abstract

Gallium nitride (GaN) thin films have been grown on Si(111) substrate by PA-MOCVD method, with trimethylgallium (TMGa) and radical nitrogen resulted by plasma of nitrogen gas as a source of Ga and N respectively. The growth was performed at 675 °C; 0.4 torr; 90 sccm and 0.08-0.12 sccm of substrate temperature, reactor pressure, gas flow of nitrogen and TMGa, respectively. The grown polycrystalline GaN thin films have hexagonal structure and n-type semiconductor. The growth rate of the grown thin films increased with increasing gas flow of TMGa. The Hall mobility value of films is still low due to the presence of O and C impurities. The highest value of mobility was found to be 64.88 cm2/V.s with 5.47 x 1018 cm-3 of carrier concentration.
N-Type Conductivity in Wurtzite Mn-Doped GaN thin Films Grown by Plasma Assisted MOCVD Budi Mulyanti; Agus Subagio; Edi Supriyanto; Heri Sutanto; Fitri Suryani Arsyad; Pepen Arifin; Maman Budiman; Mohamad Barmawi
Jurnal Matematika & Sains Vol 11, No 2 (2006)
Publisher : Institut Teknologi Bandung

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Ferromagnetic semiconductor GaN:Mn thin films were successfully grown by plasma-assisted metalorganic chemical vapor deposition (PA-MOCVD) method on c-plane sapphire substrate. The films were grown at various Mn source flux in the range of 5 - 40 sccm and growth temperature which was lower than that of MOCVD themal, i.e. in the range of 625-700 °C. Cyclopentadienyl manganese tricarbonyl (CpMnT) was used as a source of Mn. X-ray diffraction patterns confirmed that GaN:Mn films are wurtzite and do not show second phase for film with Mn concentration up to 6.4% at 650 °C of growth temperature. Hall effect measurements show n-type characteristics. The carrier (electron) density tends to decreases and Hall mobility tends to with the increase of Mn concentration is increased. Hysteresis curves observed from VSM measurements indicated that all of the samples are ferromagnetic at room temperature.
Edukasi Pemanfaatan Panel Surya sebagai Sumber Listrik Ramah Lingkungan di Kantor Partai Politik Gerindra Lampung Gerindra Lampung Tahir Rohili; Edi Supriyanto; Riffandi Sunanto; Ari Novi Wibowo; Bulyan Mahalli
Jurnal Pengabdian Cendekia Vol. 2 No. 1 (2026): In Press
Publisher : PT Pustaka Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71417/jpc.v2i1.80

Abstract

Dalam rangka mendukung target nasional Indonesia dalam transisi energi dan pengurangan emisi karbon, pemanfaatan panel surya di lingkungan institusi politik menjadi langkah strategis yang perlu ditingkatkan. Tujuan penelitian ini adalah untuk mengevaluasi efektivitas program edukasi pemanfaatan panel surya di kantor Partai Politik Gerindra Lampung dalam meningkatkan pengetahuan, persepsi, dan kesiapan aksi mereka terhadap adopsi energi terbarukan. Jenis penelitian yang digunakan adalah kualitatif dengan metode participatory action research (PAR) dan community-based education. Populasi penelitian meliputi seluruh pengurus dan anggota aktif Partai Politik Gerindra Lampung di wilayah Lampung, dengan sampel sebanyak 45 peserta yang dipilih secara purposive. Instrumen pengumpulan data meliputi wawancara mendalam, observasi, kuesioner pre-post test, dan lembar evaluasi kegiatan. Teknik analisis data menggunakan analisis tematik untuk data kualitatif dan uji statistik paired t-test untuk data kuantitatif. Hasil menunjukkan peningkatan signifikan pengetahuan peserta dari rata-rata skor awal 45,2 menjadi 78,6 (p<0,001), serta perubahan positif dalam persepsi dan komitmen aksi nyata. Kesimpulan, program edukasi berbasis partisipatif ini efektif dalam meningkatkan literasi energi terbarukan di kalangan stakeholder politik dan mendorong adopsi panel surya di lingkungan kantor partai. Rekomendasi strategis meliputi dukungan kebijakan dan skema pendanaan untuk percepatan transisi energi
Co-Authors Agus Subagio Ari Novi Wibowo Budi Mulyanti Bulyan Mahalli Fitri Suryani Arsyad Heri Sutanto Maman Budiman Mohamad Barmawi Pepen Arifin Riffandi Sunanto Sukirno Sukirno Tahir Rohili