期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 10, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201705079
关键词
built-in electric field; charge transport layers; electric dipole layers; interface engineering; polymer solar cells
类别
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20173010013000]
- National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning (MSIP) [NRF-2015M1A2A2057510]
- NRF - MSIP [NRF-2017K1A1A2013153]
- GIST Research Institute (GRI) - GIST
- Korea Evaluation Institute of Industrial Technology (KEIT) [20173010013000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science, ICT & Future Planning, Republic of Korea [GIST-14] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017K1A1A2013153] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The collection efficiency of photogenerated charges in polymer solar cells (PSCs) is strongly influenced by the built-in field (E-in) that develops across the photoactive materials. Here, by investigating the E-in-development regimes in PSCs by introducing two types of interlayers, electric dipole layers (EDLs) and charge transport layers (CTLs), the device architecture is optimized to result in a larger E-in. By incorporating a pair of EDLs on both sides of the photoactive layer, the E-in is modulated by shifting the vacuum energy at each metal-semiconductor interface, providing a larger E-in than that in conventional PSCs using typical CTLs, such as metal oxides and/or conducting polymers. These devices using paired EDLs exhibit an average PCE of 9.8%, which far surpasses the average PCE of approximate to 8.5% for paired CTLs.
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