期刊
NANOSCALE
卷 8, 期 10, 页码 5552-5558出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr00206d
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资金
- National Natural Science Foundation of China [21204054, 51303118, 91333204, 51302178]
- Natural Science Foundation of Jiangsu Province [BK20130289, BK20130295]
- Ph.D. Programs Foundation of Ministry of Education of China [20133201120008]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Scientific Research Foundation for Returned Scholars
- Ministry of Education of China
- Beijing National Laboratory for Molecular Sciences
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
For perovskite solar cells (Pero-SCs), one of the key issues with respect to the power conversion efficiency (PCE) is the morphology control of the perovskite thin-films. In this study, an easily-accessible additive polyethylenimine (PEI) is utilized to tune the morphology of CH3NH3PbI3-Cl-x(x). With addition of 1.00 wt% of PEI, the smoothness and crystallinity of the perovskite were greatly improved, which were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). A summit PCE of 14.07% was achieved for the p-i-n type Pero-SC, indicating a 26% increase compared to those of the devices without the additive. Both photoluminescence (PL) and alternating current impedance spectroscopy (ACIS) analyses confirm the efficiency results after the addition of PEI. This study provides a low-cost polymer additive candidate for tuning the morphology of perovskite thin-films, and might be a new clue for the mass production of Pero-SCs.
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