Performance-limiting formation dynamics in mixed-halide perovskites

Abstract

Bromide inclusion altered the formation dynamics and defect physics of wide-bandgap perovskite compositions.

Steric Engineering Enables Efficient and Photostable Wide‐Bandgap Perovskites for All‐Perovskite Tandem Solar Cells

“…[ 13–15 ] As a result, mixed I/Br‐based WBG solar cells suffer from large open‐circuit voltage ( V oc ) deficits and performance degradation under illumination. [ 16–21 ]…”

“…[13][14][15] As a result, mixed I/Br-based WBG solar cells suffer from large open-circuit voltage (V oc ) deficits and performance degradation under illumination. [16][17][18][19][20][21] Reducing the Br content while maintaining required bandgaps through steric engineering offers a potential approach to increase the photostability of WBG perovskites. Incorporating Cs at A-site can modulate the metal-halide bond angle and increase the bandgap to 1.75 eV while limiting the Br fraction below 30%.…”

Improving the performance of inorganic perovskite solar cells via the perovskite quantum dot dynamically mediated film growth method

“…16 Meanwhile, due to bromine doping, the crystalline quality of the perovskite film is relatively low and thus the defects are easily formed. 17,18 The defects cause nonradiative recombination, charge trapping, ion migration and material degradation, and thus lead to a decrease of the PCE. 19 To overcome these disadvantages, interface engineering is a good strategy.…”

The Path to Perovskite Commercialization: A Perspective from the United States Solar Energy Technologies Office

“…SETOfunded work spans fundamental and applied research to advance fundamental understanding of intrinsic degradation while examining degradation modes that will be most relevant in fielded perovskite PV modules. For example, SETO supports projects aimed at mitigating PV cell degradation in moisture and air, 36 due to thermal stress and light, 37 due to thermomechanical stress, 30 and from defects that arise in ink chemistries. 38 SETO also funds the Perovskite PV Accelerator for Commercializing Technology (PACT), a joint effort colead by Sandia National Laboratories (SNL) and the National Renewable Energy Laboratory (NREL), to coordinate efforts in fielded deployment testing.…”