Journal Article

FZJ-2021-01149

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interface Optimization via Fullerene Blends Enables Open-Circuit Voltages of 1.35 V in CH3NH3Pb(I0.8Br0.2)3 Solar Cells

Liu, Z.FZJ* ; Siekmann, J. (Corresponding author)FZJ* ; Klingebiel, B.FZJ* ; Rau, U.FZJ* ; Kirchartz, T. (Corresponding author)FZJ*

2021
Wiley-VCH Weinheim

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/27753  doi:10.1002/aenm.202003386

Abstract: Nonradiative recombination processes are the biggest hindrance to approaching the radiative limit of the open‐circuit voltage for wide bandgap perovskite solar cells. In addition to high bulk quality, good interfaces and good energy level alignment for majority carriers at charge transport layer‐absorber interfaces are crucial to minimize nonradiative recombination pathways. By tuning the lowest‐unoccupied molecular‐orbital of electron transport layers via the use of different fullerenes and fullerene blends, open‐circuit voltages exceeding 1.35 V in CH3NH3Pb(I0.8Br0.2)3 device are demonstrated. Further optimization of mobility in binary fullerenes electron transport layers can boost the power conversion efficiency as high as 18.9%. It is noted in particular that the Voc fill factor product is >1.096 V, which is the highest value reported for halide perovskites with this bandgap.

---

Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Photovoltaik und Windenergie (POF4-121) (POF4-121)

Appears in the scientific report 2021

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 20 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---