期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 163, 期 -, 页码 210-217出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2017.01.040
关键词
Perovsldte solar cells; PVK; Hole transport; Stability
资金
- National Natural Science Foundation of China [21504065]
- Fundamental Research Funds for the Central Universities of China [WUT: 2015111018, 2015111029]
- Recruitment Program of Global Experts (1000 Talents Plan) of China
Conjugated polymer poly(9-vinylcarbazole) (PVK) has been explored as an efficient hole transport material (HTM) to replace poly(3,4-ethylenedio-xythiophene): poly(styrenesulfonate) (PEDOT:PSS) for the preparation of p-i-n type, inverted planar heterojunction perovskite solar cells. The PVK film can be facilely deposited by room-temperature solution-casting without any doping or post treatments. Using MAPbI(3) as the photoactive layer, a 15.8% stabilized power conversion efficiency was achieved in ITO/PVK/MAPbI(3)/PCBM/Ag devices, which is a significant improvement compared with 12.1% from devices using PEDOT:PSS as the HTM. The perovskite photoactive layer cast on PVK HTM has higher crystallinity and less PbI2 residues, leading to a higher charge recombination resistance of the device. After a storage of 1000 h, the PCE of PVK- and PEDOT:PSS-based devices dropped to 82.5% and 56% respectively, and demonstrated that the PVK-based perovskite devices is more stable compared with the PEDOT:PSS-based devices.
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