TY  - JOUR
KW  - PCBM-CH3NH3PbI3 heterojunction
KW  -  Solvent engineering
KW  -  Photodetector
KW  -  Stable
N2  - In this work, an anti-solvent process was used to fabricate a perovskite-PCBM bulk heterojunction, in which PCBM diffused in CH3NH3PbI3 and passivated grain boundary defects. Different concentrations of PCBM were studied in this paper. When a low concentration (5?mg/ml, 10?mg/ml or 15?mg/ml) of PCBM was used, the PCBM-CH3NH3PbI3 transition layer provided efficient electron collection. With the increase of the concentration of PCBM, a thicker PCBM layer was formed in the bulk heterojunction. Such a thick PCBM resulted in rough perovskite morphology and low photo-carrier collection efficiency. SEM images and metallographic microscope images confirmed that the PCBM upper layer gradually covered grain boundaries of perovskite films with the increase of the PCBM concentration. On the other hand, low concentrations of PCBM improved the light absorption and crystallinity of CH3NH3PbI3 films. The PCBM/perovskite heterojunction exhibited a high UV responsivity of 0.18?AW-1 and a response time less than 123?ms. This research provides a way to improve the quality of perovskite films and the performance of perovskite photodetectors.
ID  - discovery10059461
PB  - ELSEVIER SCIENCE BV
TI  - Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability
AV  - public
Y1  - 2018/06/01/
EP  - 268
JF  - Organic Electronics
A1  - Wang, Y
A1  - Zhang, T
A1  - Zhang, P
A1  - Liu, D
A1  - Ji, L
A1  - Chen, H
A1  - Chen, ZD
A1  - Wu, J
A1  - Li, S
UR  - http://doi.org/10.1016/j.orgel.2018.02.043
SN  - 1878-5530
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
VL  - 57
SP  - 263
ER  -