All-in-One Deposition to Synergistically Manipulate Perovskite Growth for High-Performance Solar Cell
Open Access
- 1 January 2020
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Research
- Vol. 2020, 2763409
- https://doi.org/10.34133/2020/2763409
Abstract
Nonradiative recombination losses originating from crystallographic distortions and issues occurring upon interface formation are detrimental for the photovoltaic performance of perovskite solar cells. Herein, we incorporated a series of carbamide molecules (urea, biuret, or triuret) consisting of both Lewis base (NH2) and Lewis acid (C=O) groups into the perovskite precursor to simultaneously eliminate the bulk and interface defects. Depending on the different coordination ability with perovskite component, the incorporated molecules can either modify crystallization dynamics allowing for large crystal growth at low temperature (60C), associate with antisite or undercoordinated ions for defect passivation, or accumulate at the surface as an energy cascade layer to enhance charge transfer, respectively. Synergistic benefits of the above functions can be obtained by rationally optimizing additive combinations in an all-in-one deposition method. As a result, a champion efficiency of 21.6 with prolonged operational stability was achieved in an inverted MAPbI3 perovskite solar cell by combining biuret and triuret additives. The simplified all-in-one fabrication procedure, adaptable to different types of perovskites in terms of pure MAPbI3, mixed perovskite, and all-inorganic perovskite, provides a cost-efficient and reproducible way to obtain high-performance inverted perovskite solar cells.Keywords
Funding Information
- National Natural Science Foundation of China (51811530018, 61935017)
- Six Talent Peaks Project in Jiangsu Province (2019-XNY-013)
- Natural Science Foundation of Jiangsu Province (BK20171022)
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