期刊
MATERIALS HORIZONS
卷 2, 期 6, 页码 613-618出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5mh00154d
关键词
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资金
- Swiss National Science Foundation (SNF)-NRP70 [PV2050, 407040-153990, 40740-153952]
- Swiss Confederation under the Sciex-NMS exchange program [13.194]
- Swiss National Science Foundation (SNF) [407040_153990] Funding Source: Swiss National Science Foundation (SNF)
We present the design and synthesis of a promising hole transporting material (HTM) using the 4,40-spirobi[cyclopenta[2,1-b: 3,4-b']dithiophene] derivative (spiro-CPDT) as the core and triarylamines as terminal units. The implementation of the new HTM in CH3NH3PbI3-based perovskite solar cells exhibited an excellent overall power conversion efficiency (PCE) of 13.4% without the use of any dopants and additives which is comparable to 15.0% obtained using p-doped spiro-MeOTAD-based devices. Furthermore, the device based on the new HTM generated a slightly higher open circuit voltage (V-OC) of 971 mV compared to a spiro-MeOTAD (V-OC = 951 mV) based device. The present results demonstrate that spiro-CPDT could be an excellent building block to prepare dopant-free HTMs for perovskite solar cells and holds promise to replace the p-doped spiro-OMeTAD, which is important for the fabrication of cost-effective devices in the future.
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