Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 10, Issue 3, Pages 765-770Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2019.2959952
Keywords
Crystals; Doping; Photovoltaic cells; Additives; Absorption; Photovoltaic systems; Cationic additive; crystal qualities; perovskite solar cells; recombination decrease; stability in humidity
Funding
- Natural Science Foundation of Jiangsu Province, China [BK20180601]
- Fundamental Research Funds for the Central Universities [JUSRP11834, JUSRP11834B]
- Jiangsu Postdoctoral Science Foundation [2018K112C, 2018K113C]
- National Key Research and Development Program of China [2016YFB0700700]
- National Natural Science Foundation of China [51673025]
- Lab and Equipment Management of Jiangnan University [JDSYS201906]
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The compactness of perovskite active layers plays an essential role in the energy conversion. In order to promote the crystal quality, poly(allylamine hydrochloride) (PAH) was employed as an additive to promote the crystal quality for the active layers. The cationic additive significantly enhanced the compactness of the perovskite absorber film, which promoted the charge transport efficiency, resulting in an average efficiency over 19%. The unique properties of PAH make it act as a glue to link the grain boundaries and promote the crystal quality, thus favoring the charge transfer and suppressing the recombination under the certain doping amount. Meanwhile, the stability of perovskite solar cells in humidity environments was dramatically promoted without encapsulation. The sample has a long shelf life (over 600 h). This strategy can also be used to guide the crystal development of other optoelectronic devices, such as light-emitting diodes and lasers, which have recently involved the hybrid perovskite materials.
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