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Impact of different light induced effect on organic hole-transporting layer in perovskite solar cells

Bhandari, Shubhranshu; Roy, Anurag; Mallick, Tapas K.; Sundaram, Senthilarasu

Authors

Shubhranshu Bhandari

Anurag Roy

Tapas K. Mallick



Abstract

Here, we report two different light sources such as UV-ozone and visible light to treat the graphene-PEDOT:PSS [Poly (3, 4-ethylenedioxythiophene):poly (styrenesulfonate)] layer, which acts as an organic hole-transporting layer (HTL) for the CH3NH3PbI3 based semi-transparent perovskite solar cells (PSCs), respectively. The HTL was exposed under the UV-ozone and visible light for 5, 15 and 25 min to understand the effect of different light source and irradiation time on the device’s performance, respectively. The optimized 5 min UV-ozone and visible light treated PSCs exhibit a maximum photo-conversion efficiency (PCE) of 7.6% and 11.6%, respectively, which is significantly higher than the untreated PSC (5.17%). This dramatic performance is mainly driven by improvements in the device’s short circuit current as well as the fill factor after different light treatment, which actually improves the adhesion between the HTL and CH3NH3PbI3 by rectifying the layer defects. In addition, we also established contact angle measurement as an indirect tool to understand the effect of light treatment on HTL and PCE enhancement, respectively.

Journal Article Type Article
Acceptance Date Feb 25, 2020
Online Publication Date Feb 26, 2020
Publication Date 2020-06
Deposit Date Mar 13, 2023
Journal Materials Letters
Print ISSN 0167-577X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 268
Article Number 127568
DOI https://doi.org/10.1016/j.matlet.2020.127568