13% efficiency hybrid organic/silicon-nanowire heterojunction solar cell via interface engineering
| Autor: | Shih Wei Chen, Jan-Kai Chang, Hsin-Fei Meng, Ming Chin Li, Chen-Hsun Du, Pei Ting Tsai, Sheng-fu Horng, Chia Ying Tsai, Yu-Lun Chueh, Po Han Chen, Yang-Yue Huang, Chih-Chung Lai, Yi Chun Lai, Huai Te Pan, Peichen Yu, Chih-I Wu |
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| Rok vydání: | 2013 |
| Předmět: |
Conductive polymer
Materials science Silicon business.industry General Engineering General Physics and Astronomy chemistry.chemical_element Heterojunction Hybrid solar cell Carrier lifetime law.invention chemistry PEDOT:PSS Photovoltaics law Solar cell Optoelectronics General Materials Science business |
| Zdroj: | ACS nano. 7(12) |
| ISSN: | 1936-086X |
| Popis: | Interface carrier recombination currently hinders the performance of hybrid organic-silicon heterojunction solar cells for high-efficiency low-cost photovoltaics. Here, we introduce an intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) layer into hybrid heterojunction solar cells based on silicon nanowires (SiNWs) and conjugate polymer poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS). The highest power conversion efficiency reaches a record 13.01%, which is largely ascribed to the modified organic surface morphology and suppressed saturation current that boost the open-circuit voltage and fill factor. We show that the insertion of TAPC increases the minority carrier lifetime because of an energy offset at the heterojunction interface. Furthermore, X-ray photoemission spectroscopy reveals that TAPC can effectively block the strong oxidation reaction occurring between PEDOT:PSS and silicon, which improves the device characteristics and assurances for reliability. These learnings point toward future directions for versatile interface engineering techniques for the attainment of highly efficient hybrid photovoltaics. |
| Databáze: | OpenAIRE |
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