Title: | Solution p-doped fluorescent polymers for enhanced charge transport of hybrid organic-silicon nanowire photovoltaics |
Authors: | Tsai, Pei-Ting Li, Ming-Chin Lai, Yi-Chun Tseng, Wei-Hsuan Wu, Chih-I Chen, Si-Han Lin, Yi-Cheng Chen, Yu-Cheng Hsiao, Rui-Chung Horng, Sheng-Fu Yu, Peichen Meng, Hsin-Fei 光電工程學系 Department of Photonics |
Keywords: | Hybrid solar cell;Heterojunction;Interface engineering;Charge transport;Surface recombination |
Issue Date: | Jul-2016 |
Abstract: | The solution p-type doping of various conjugated polymers and small molecules via blending with tetrafluorotetracyano-quinodimethane (F4-TCNQ) is investigated to facilitate hole transport for hybrid organic-silicon-nanowire solar cells. Among all, the highly-fluorescent conjugated polymers such as poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) demonstrate superior transport characteristics, where both the device fill-factor and power conversion efficiency (PCE) are positively correlated with the doping concentration. The best PCE achieves 13.66% from the device with 30% p-doped PFO, compared to the reference at 12.50%. The enhancement is ascribed to the efficient interfacial charge-carrier recombination with minimal energy losses. A vertically graded doping profile is further revealed with F4-TCNQ molecules preferentially accumulated near the silicon surface. (C) 2016 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.orgel.2016.04.005 http://hdl.handle.net/11536/133728 |
ISSN: | 1566-1199 |
DOI: | 10.1016/j.orgel.2016.04.005 |
Journal: | ORGANIC ELECTRONICS |
Volume: | 34 |
Begin Page: | 254 |
End Page: | 261 |
Appears in Collections: | Articles |