%0 Journal Article
%A Krückemeier, Lisa
%A Liu, Zhifa
%A Kirchartz, Thomas
%A Rau, Uwe
%T Quantifying Charge Extraction and Recombination Using the Rise and Decay of the Transient Photovoltage of Perovskite Solar Cells
%J Advanced materials
%V 35
%N 35
%@ 0935-9648
%C Weinheim
%I Wiley-VCH
%M FZJ-2023-02038
%P 2300872
%D 2023
%X The extraction of photogenerated charge carriers and the generation of a photovoltage belong to the fundamental functionalities of any solar cell. These processes happen not instantaneously but rather come with finite time constants, e.g., a time constant related to the rise of the externally measured open circuit voltage following a short light pulse. Herein, a new method to analyze transient photovoltage measurements at different bias light intensities combining rise and decay times of the photovoltage. The approach uses a linearized version of a system of two coupled differential equations that are solved analytically by determining the eigenvalues of a 2 × 2 matrix. By comparison between the eigenvalues and the measured rise and decay times during a transient photovoltage measurement, the rates of carrier recombination and extraction as a function of bias voltage are determined, and establish a simple link between their ratio and the efficiency losses in the perovskite solar cell.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 37147880
%U <Go to ISI:>//WOS:001031871500001
%R 10.1002/adma.202300872
%U https://juser.fz-juelich.de/record/1007373