Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system

碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 107 === In recent years, the passivated emitter rear cell (PERC) solar cell has benefits such as easy fabrication and high conversion efficiency which demonstrate a promising cell structure of Si-based solar cells. In general, the alumina oxide was deposited on the e...

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Main Authors: Yu-Rong Jiang, 蔣侑融
Other Authors: Wen-Cheng Ke
Format: Others
Language:zh-TW
Published: 2019
Online Access:http://ndltd.ncl.edu.tw/handle/59am73
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spelling ndltd-TW-107NTUS55660442019-10-23T05:46:03Z http://ndltd.ncl.edu.tw/handle/59am73 Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system 利用混成式電漿化學氣相沉積系統製備類鑽碳鈍化層及其電特性分析 Yu-Rong Jiang 蔣侑融 碩士 國立臺灣科技大學 材料科學與工程系 107 In recent years, the passivated emitter rear cell (PERC) solar cell has benefits such as easy fabrication and high conversion efficiency which demonstrate a promising cell structure of Si-based solar cells. In general, the alumina oxide was deposited on the emitter region of PERC for passivation purpose. It is well known that the DLC thin films exhibits many advantages such as high hardness, transparency in visible-light and IR-light and high resistivity etc. In this study, the diamond like carbon (DLC) thin films is tried to grow on the p-type Si substrate by combined electron-cyclotron resonance (ECR) plasma and radio-frequency (RF) plasma chemical vapor deposition (CVD), namely hybrid plasma CVD (HPCVD) system. The growth parameters of DLC thin films such as precursors flow ratio of CH4 and H2, working pressure and RF power are optimized in order to find a better passivation result. The capacitance-voltage (C-V) measurement of samples constructed by metal Al/DLC/p-Si/metal Al are used for studied the fix-charge density, trap-center density and interface defect density of DLC passivation layer by techniques of the flat-band voltage, hysteresis behavior and conductance. The quasi steady state photoconductivity (QSSPC) is also be used for carrier lifetime measurement. In addition, the leakage current of sample structure is studied by the current-voltage (I-V) measurement. Finally, an optimized DLC passivation layer with growth conditions: working pressure of 1 torr, CH4/H2 flow ratio of 10/90 sccm, RF power of 150 W is used for achieving the lowest surface recombination rate (0.23 cm/s), interface defect density (2.25×〖10〗^10 〖eV〗^(-1) 〖cm〗^(-2)). In addition, the carrier lifetime is increased from 2.99 s for p-Si substrate to 9.85 s for DLC passivated p-Si substrate. Wen-Cheng Ke 柯文政 2019 學位論文 ; thesis 95 zh-TW
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language zh-TW
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description 碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 107 === In recent years, the passivated emitter rear cell (PERC) solar cell has benefits such as easy fabrication and high conversion efficiency which demonstrate a promising cell structure of Si-based solar cells. In general, the alumina oxide was deposited on the emitter region of PERC for passivation purpose. It is well known that the DLC thin films exhibits many advantages such as high hardness, transparency in visible-light and IR-light and high resistivity etc. In this study, the diamond like carbon (DLC) thin films is tried to grow on the p-type Si substrate by combined electron-cyclotron resonance (ECR) plasma and radio-frequency (RF) plasma chemical vapor deposition (CVD), namely hybrid plasma CVD (HPCVD) system. The growth parameters of DLC thin films such as precursors flow ratio of CH4 and H2, working pressure and RF power are optimized in order to find a better passivation result. The capacitance-voltage (C-V) measurement of samples constructed by metal Al/DLC/p-Si/metal Al are used for studied the fix-charge density, trap-center density and interface defect density of DLC passivation layer by techniques of the flat-band voltage, hysteresis behavior and conductance. The quasi steady state photoconductivity (QSSPC) is also be used for carrier lifetime measurement. In addition, the leakage current of sample structure is studied by the current-voltage (I-V) measurement. Finally, an optimized DLC passivation layer with growth conditions: working pressure of 1 torr, CH4/H2 flow ratio of 10/90 sccm, RF power of 150 W is used for achieving the lowest surface recombination rate (0.23 cm/s), interface defect density (2.25×〖10〗^10 〖eV〗^(-1) 〖cm〗^(-2)). In addition, the carrier lifetime is increased from 2.99 s for p-Si substrate to 9.85 s for DLC passivated p-Si substrate.
author2 Wen-Cheng Ke
author_facet Wen-Cheng Ke
Yu-Rong Jiang
蔣侑融
author Yu-Rong Jiang
蔣侑融
spellingShingle Yu-Rong Jiang
蔣侑融
Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
author_sort Yu-Rong Jiang
title Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
title_short Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
title_full Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
title_fullStr Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
title_full_unstemmed Electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
title_sort electrical characteristics of diamond-like carbon passivation layer on silicon substrate grown by hybrid plasma chemical vapor deposition system
publishDate 2019
url http://ndltd.ncl.edu.tw/handle/59am73
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