In:
Energy Technology, Wiley, Vol. 10, No. 10 ( 2022-10)
Kurzfassung:
Recently, CuCrO 2 films have been successfully introduced as effective hole‐transporting materials in perovskite solar cells (PSCs). However, the long reaction time (≈50–60 h) at the high temperature of hydrothermal synthesis and the complexity of conversion from nanoparticles to uniform films hinder the application of CuCrO 2 nanoparticles in PSCs. Herein, a simple, low‐cost, and highly reproducible method for the spray pyrolysis deposition (SPD) of Cu‐deficient CuCrO 2 films is reported. The resulting CuCrO 2 films exhibit advantages in terms of transparency, roughness, and electrical properties compared to their extensively studied NiO x counterparts. Meanwhile, the deep‐lying valence‐band‐maximum of CuCrO 2 films matches very well with that of perovskite materials, minimizing the charge‐extraction barrier. As a result, the excellent electrical properties and energetically favorable energy‐level alignment of the CuCrO 2 film allow efficient charge transport from the perovskite layer to the hole transport layer (HTL). Consequently, the optimized CuCrO 2 ‐based device delivers an outstanding power conversion efficiency of 18.86% versus 16.80% for NiO x ‐based devices. This work demonstrates the validity of a CuCrO 2 film derived from the SPD method as an HTL for highly efficient PSCs.
Materialart:
Online-Ressource
ISSN:
2194-4288
,
2194-4296
DOI:
10.1002/ente.202200518
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2022
ZDB Id:
2700412-0
