https://scholars.lib.ntu.edu.tw/handle/123456789/501696
標題: | Rear interface engineering of hybrid organic-silicon nanowire solar cells via blade coating | 作者: | Lai, Yi-Chun Chang, Yu-Fan Tsai, Pei-Ting Chang, Jan-Kai Tseng, Wei-Hsuan Lin, Yi-Cheng Hsiao, Chu-Yen Zan, Hsiao-Wen Wu, Chih-I. Chi, Gou-Chung Meng, Hsin-Fei YI-CHENG LIN |
公開日期: | 2016 | 卷: | 24 | 期: | 2 | 起(迄)頁: | A414-A423 | 來源出版物: | Optics Express | 摘要: | In this work, we investigate blade-coated organic interlayers at the rear surface of hybrid organic-silicon photovoltaics based on two small molecules: Tris(8-hydroxyquinolinato) aluminium (Alq3) and 1,3-bis(2-(4- Tert-butylphenyl)-1,3,4-oxadiazol-5-yl) benzene (OXD-7). In particular, soluble Alq3 resulting in a uniform thin film with a root-mean-square roughness < 0.2nm is demonstrated for the first time. Both devices with the Alq3 and OXD-7 interlayers show notable enhancement in the open-circuit voltage and fill-factor, leading to a net efficiency increase by over 2% from the reference, up to 11.8% and 12.5% respectively. The capacitance-voltage characteristics confirm the role of the small-molecule interlayers resembling a thin interfacial oxide layer for the Al-Si Schottky barrier to enhance the built-in potential and facilitate charge transport. Moreover, the Alq3 interlayer in optimized devices exhibits isolated phases with a large surface roughness, in contrast to the OXD-7 which forms a continuous uniform thin film. The distinct morphological differences between the two interlayers further suggest different enhancement mechanisms and hence offer versatile functionalities to the advent of hybrid organic-silicon photovoltaics. © 2016 Optical Society of America. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/501696 | ISSN: | 1094-4087 | DOI: | 10.1364/OE.24.00A414 | SDG/關鍵字: | Capacitance; Cell engineering; Molecules; Open circuit voltage; Schottky barrier diodes; Silicon solar cells; Solar cells; Surface roughness; Thin films; Built-in potential; Capacitance voltage characteristic; Efficiency increase; Enhancement mechanism; Interface engineering; Interfacial oxide layers; Organic interlayers; Root mean square roughness; Composite films |
顯示於: | 電機工程學系 |
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