TY  - JOUR
A1  - Paulke, Andreas
A1  - Stranks, Samuel D.
A1  - Kniepert, Juliane
A1  - Kurpiers, Jona
A1  - Wolff, Christian Michael
A1  - Schön, Natalie
A1  - Snaith, Henry J.
A1  - Brenner, Thomas J. K.
A1  - Neher, Dieter
T1  - Charge carrier recombination dynamics in perovskite and polymer solar cells
JF  - Applied physics letters
N2  - Time-delayed collection field experiments are applied to planar organometal halide perovskite (CH3NH3PbI3) based solar cells to investigate charge carrier recombination in a fully working solar cell at the nanosecond to microsecond time scale. Recombination of mobile (extractable) charges is shown to follow second-order recombination dynamics for all fluences and time scales tested. Most importantly, the bimolecular recombination coefficient is found to be time-dependent, with an initial value of ca. 10(-9) cm(3)/s and a progressive reduction within the first tens of nanoseconds. Comparison to the prototypical organic bulk heterojunction device PTB7:PC71BM yields important differences with regard to the mechanism and time scale of free carrier recombination. (C) 2016 AIP Publishing LLC.
Y1  - 2016
U6  - https://doi.org/10.1063/1.4944044
SN  - 0003-6951
SN  - 1077-3118
VL  - 108
SP  - 252
EP  - 262
PB  - American Institute of Physics
CY  - Melville
ER  -