期刊
ADVANCED ENERGY MATERIALS
卷 7, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201602812
关键词
device stability; one-step process; polymer additives; polymer solar cells; work function reduction
类别
资金
- National Research Foundation [2012M3A6A7055540, 2015M1A2A2057509]
- Korean Government
- KETEP
- MOTIE of the Republic of Korea [20163030013620]
- KAIST-KUSTAR
- Korea Evaluation Institute of Industrial Technology (KEIT) [20163030013620] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012M3A6A7055540, 2015M1A2A2057509, 10Z20130011056] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Interfaces between the photoactive layers and electrodes play critical roles in controlling the performance of optoelectronic devices. Herein, a novel nonconjugated polymer additive (nPA), poly(2-vinylpyridine) (P2VP), is reported for modifying the interfaces between the bulk-heterojunction (BHJ) and cathode/metal oxide (MO) layers. The P2VP nPA enables remarkably enhanced power conversion efficiencies (PCEs) and ambient stability in different types of polymer solar cells (PSCs). Importantly, interfacial engineering can be achieved during deposition of the P2VP nPA-containing BHJ active layer via simple, one-step solution processing. The P2VP nPA has much higher surface energy than the BHJ active components and stronger interaction with the surface of MO, which affords spontaneous vertical phase separation from the BHJ layer on the MO surface by one-step solution processing. The self-assembled P2VP layer substantially reduces the work function and surface defect density of MO, thereby minimizing the charge-extraction barrier and increasing the PCEs of the PSCs significantly, i.e., PTB7-Th: PC71BM (10.53%-> 11.14%), PTB7:PC71BM (7.37%-> 8.67%), and PTB7-Th:P(NDI2HD-T) all-PSCs (5.52%-> 6.14%). In addition, the lifetimes of the PSCs are greatly improved by the use of the P2VP nPA.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据