期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 37, 页码 14234-14240出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta05303c
关键词
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资金
- Cluster of Excellence Engineering of Advanced Materials at the University of Erlangen-Nuremberg
- German Research Foundation (DFG)
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2009-0081571[RIAM0417-20150013]]
- Solar Technologies go Hybrid (SolTech) project
- Energy Campus Nurnberg (EnCN) - Bavarian state government
- Jiangsu Provincial Natural Science Foundation [BK20150327]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [15KJB430028]
- China Postdoctoral Science Foundation [2015M581855]
- [Sonderforschungsbereich 953]
The use of small volumes of solvent additives (SAs) or little amounts of non-volatile additives is a processing approach that has been implemented in many high/record performing bulk heterojunction (BHJ) organic solar cells (OSCs). Here, the effects of six SA systems and a molecular additive di-2-thienyl-2,1,3-benzothiadiazole (DTBT) were studied with respect to the photovoltaic parameters of solution-processed all small molecule solar cells (all-SMSCs) based on the BDTT-S-TR: NIDCS-MO system. An effective strategy with binary additives has been employed in this all-SM system, where a small amount, 0.75 vol% 1,8-diiodooctane (DIO) and 2 wt% DTBT were added to the casting solution. This efficient SA approach yielded the highest power conversion efficiency (PCE) of 5.33%. The relevant additives facilitate phase separation in the nm domains and improve bulk transport as evidenced by photoluminescence (PL), atomic force microscopy (AFM), X-ray diffraction (XRD) and space charge limited current (SCLC) measurements.
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