Wang, Y;
Zhang, T;
Zhang, P;
Liu, D;
Ji, L;
Chen, H;
Chen, ZD;
... Li, S; + view all
(2018)
Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability.
Organic Electronics
, 57
pp. 263-268.
10.1016/j.orgel.2018.02.043.
Preview |
Text
Solution processed detectors.pdf - Accepted Version Download (1MB) | Preview |
Abstract
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.
| Type: | Article |
|---|---|
| Title: | Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.orgel.2018.02.043 |
| Publisher version: | http://doi.org/10.1016/j.orgel.2018.02.043 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | PCBM-CH3NH3PbI3 heterojunction, Solvent engineering, Photodetector, Stable |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059461 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
