Efficient wide-bandgap perovskite solar cells enabled by doping a bromine-rich molecule

23Citations
Citations of this article
51Readers
Mendeley users who have this article in their library.

Abstract

Wide-bandgap (wide-Eg, ∼1.7 eV or higher) perovskite solar cells (PSCs) have attracted extensive attention due to the great potential of fabricating high-performance perovskite-based tandem solar cells via combining with low-bandgap absorbers, which is considered promising to exceed the Shockley–Queisser efficiency limit. However, inverted wide-Eg PSCs with a minimized open-circuit voltage (Voc) loss, which are more suitable to prepare all-perovskite tandem devices, are still lacking study. Here, we report a strategy of adding 1,3,5-tris (bromomethyl) benzene (TBB) into wide-Eg perovskite absorber to passivate the perovskite film, leading to an enhanced average Voc. Incorporation of TBB prolongs carrier lifetimes in wide-Eg perovskite due to reduction of defects in perovskites and makes a better energy level matching between perovskite absorber and electron transport layer. As a result, we achieve the power conversion efficiency of 17.12% for our inverted TBB-doped PSC with an enhanced Voc of 1.19 V, compared with that (16.14%) for the control one (1.14 V).

Cite

CITATION STYLE

APA

He, R., Chen, T., Xuan, Z., Guo, T., Luo, J., Jiang, Y., … Zhao, D. (2021). Efficient wide-bandgap perovskite solar cells enabled by doping a bromine-rich molecule. Nanophotonics, 10(8), 2059–2068. https://doi.org/10.1515/nanoph-2020-0634

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free