Optoelectronics Letters, Volume. 15, Issue 2, 117(2019)
Improved performance of perovskite solar cells throughusing (FA)x(MA)1-xPbI3 optical absorber layer
In this work, the perovskite solar cells (PSCs) were fabricated with the bandgap-tunable (FA)x(MA)1-xPbI3 absorber layers through a facile two-stage deposition route. The doping was realized by adding the formamidinium iodide (FAI) into a precursor MAI solution. Both the surface morphology and electrochemical impedance spectra (EIS) were con-ducted to evaluate the absorber layers or solar cells. After the optimization, the best PSC performance of 14.73% was achieved at a nominal FAI content of 12.5 at.%. The performance enhancement was attributed to both the enhance-ment of visible light harvesting and carrier transport capability. Besides, the stability of a PSC device based on the single MAPbI3 absorber layer was also investigated, and a power conversion efficiency (PCE) of 11.27 % remained even after laying in vacuum for 10 days.
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SUI Mei-rong, LI Sheng-ping, GU Xiu-quan. Improved performance of perovskite solar cells throughusing (FA)x(MA)1-xPbI3 optical absorber layer[J]. Optoelectronics Letters, 2019, 15(2): 117
Received: Jul. 23, 2018
Accepted: Aug. 13, 2018
Published Online: Apr. 16, 2019
The Author Email: Mei-rong SUI (smr2012@xzhmu.edu.cn)