標題: 11%-Efficiency Hybrid Organic/Silicon-Nanowire Heterojunction Solar Cell with an Intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane Layer
作者: Tsai, Chia-Ying
Chen, Po-Han
Huang, Yang-Yue
Pen, Huai-Te
Yu, Peichen
Meng, Hsin-Fei
物理研究所
光電工程學系
Institute of Physics
Department of Photonics
關鍵字: heterojunction;silicon nanowires (SiNWs);hybrid solar cells;nanostructure
公開日期: 2013
摘要: Hybrid organic-inorganic heterojunction solar cells based on silicon nanowires (SiNWs) are promising candidates for next-generation photovoltaics owing to potentials for low fabrication cost and high efficiency. The SiNW array, fabricated by a simple metal-assisted wet chemical etching method, produces a large surface-area-to-volume ratio, hence allowing efficient light harvesting and charge collection via the formation of a core-sheath p-n junction. However, previously reported power conversion efficiencies (PCEs) are approximately capped at 10%, which is largely depicted by the interface defect densities that limit the open-circuit voltage (V-oc) and fill factor (FF). In this work, we introduce a solution-processed, intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) layer to mitigate the interface recombination loss for hybrid heterojunction solar cells consisted of SiNWs and conjugate polymer poly(3,4-ethylenedioxy-thiophene): poly(styrenesulfonate) (PEDOT:PSS). A record PCE of 11.0% is achieved in contrast to 9.6% from a reference counterpart without TAPC, which represents an enhancement factor of 14.2% ascribed to noticeable improvement in the V-oc and FF. The result is further supported by examining indicators for the interface quality via a suppressed dark saturation current and an enhanced minority carrier lifetime which exhibits an increase from 84 mu sec without TAPC to 87 mu sec with TAPC.
URI: http://hdl.handle.net/11536/135365
ISBN: 978-1-4799-3299-3
ISSN: 0160-8371
期刊: 2013 IEEE 39TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
起始頁: 3297
結束頁: 3299
Appears in Collections:Conferences Paper