TY - JOUR

T1 - Film Deposition Techniques Impact the Defect Density and Photostability of MAPbI(3) Perovskite Films

AU - Akbulatov, Azat F.

AU - Frolova, Lyubov A.

AU - Tsarev, Sergey A.

AU - Zhidkov, Ivan

AU - Luchkin, Sergey Yu

AU - Kurmaev, Ernst Z.

AU - Stevenson, Keith J.

AU - Aldoshin, Sergey M.

AU - Troshin, Pavel A.

PY - 2020

Y1 - 2020

N2 - Over the last decade, perovskite solar cells (PSCs) have demonstrated tremendous growth in power conversion efficiencies. Different strategies toward developing new perovskite film deposition techniques were of particular help in such progress. Considering generally the poor operational stability of PSCs, understanding the influence of deposition methods on the stability of lead halide perovskite films is vital to facilitate further practical application of this technology. Herein, we studied the impact of CH3NH3PbI3 deposition methods on the photostability of perovskite films. In particular, one-step deposition in a nitrogen and an ambient air atmosphere, two-step and chemical vapor deposition, as well as close-space sublimation methods were explored. We revealed that the lifetime of absorber films under light exposure can be spectacularly extended by a factor of 2-3 when using an appropriate deposition technique. In particular, the films grown by chemical vapor deposition showed superior photostability compared to the samples obtained by other methods. A clear correlation between the concentration of defects in perovskite films and their photostability was revealed, while the grain size was shown to have a minor effect under anoxic conditions. We believe that these findings are essentially important for improving the operational lifetime of perovskite solar cells and facilitating their commercialization.

AB - Over the last decade, perovskite solar cells (PSCs) have demonstrated tremendous growth in power conversion efficiencies. Different strategies toward developing new perovskite film deposition techniques were of particular help in such progress. Considering generally the poor operational stability of PSCs, understanding the influence of deposition methods on the stability of lead halide perovskite films is vital to facilitate further practical application of this technology. Herein, we studied the impact of CH3NH3PbI3 deposition methods on the photostability of perovskite films. In particular, one-step deposition in a nitrogen and an ambient air atmosphere, two-step and chemical vapor deposition, as well as close-space sublimation methods were explored. We revealed that the lifetime of absorber films under light exposure can be spectacularly extended by a factor of 2-3 when using an appropriate deposition technique. In particular, the films grown by chemical vapor deposition showed superior photostability compared to the samples obtained by other methods. A clear correlation between the concentration of defects in perovskite films and their photostability was revealed, while the grain size was shown to have a minor effect under anoxic conditions. We believe that these findings are essentially important for improving the operational lifetime of perovskite solar cells and facilitating their commercialization.

KW - SOLAR-CELLS

KW - PHOTOCHEMICAL STABILITY

KW - EFFICIENCY

KW - HYBRID

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000577151900016

UR - http://www.scopus.com/inward/record.url?scp=85096238504&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.0c07673

DO - 10.1021/acs.jpcc.0c07673

M3 - Article

VL - 124

SP - 21378

EP - 21385

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 39

ER -