期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 18, 页码 15623-15630出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b01282
关键词
interface control; dry-stamping transfer; perovskite solar cells; morphology; crystallinity; charge-carrier dynamics
资金
- Basic Science Research Program, through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2017R1A1A1A05000772]
- National Research Foundation of Korea [2017R1A1A1A05000772] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study of interlayers is important to enhance the performance of inverted perovskite solar cells (PSCs) because interlayers in PSCs align energy levels and improve charge transport. However, previous research into applying interlayers for PSCs has focused only on wet-coated methods, such as spin coating, to form the interlayer. Here, we fabricated planar-type PSCs deposited with a 6,6-phenyl-C-71 butyric acid methyl ester (PC71BM) layer onto a CH3NH3PbI3 (MAPbI(3)) layer by stamping transfer through a relatively dry process condition. We demonstrated the effects of a stamping-transferred PC71BM layer using polyurethane acrylate (PUA), the surface energy of which was modified by 2-hydroxyethyl methacrylate (HEMA) to increase the transfer reproducibility. In PSCs with a stamping transferred PC71BM layer, we observed an enhanced J(SC) and a comparable power conversion efficiency (PCE), which were caused by an enhanced coverage of the electron transport layer onto the MAPbI(3) layer with preserved crystallinity, which occurs owing to improved electron mobility and exciton dissociation. The optimized device PCE through the dry-transferred PC71BM exhibited a J(SC), fill factor, and PCE of 21.65 mA/cm(2), 76.0%, and 15.46%, respectively. Moreover, morphological analysis and electrical measurements confirmed the improved durability of dry-stamping-transferred PSCs.
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