Greatly improved photoresponse in the MAPbBr3/Si heterojunction by introducing an ITO layer and optimizing MAPbBr3 layer thickness.
Opt Express
; 30(7): 11536-11548, 2022 Mar 28.
Article
in En
| MEDLINE
| ID: mdl-35473096
ABSTRACT
In this paper, a CH3NH3(MA)PbBr3/Si heterojunction photodetector (PD) is prepared, and a simple method is proposed to improve the performance by introducing an ITO conductive layer and modulating thickness of the MAPbBr3 layer. The results indicate that the MAPbBr3/Si heterojunction PD exhibits an ultra-broadband photoresponse ranging from 405 to 1064 nm, and excellent performances with the responsivity (R) of 0.394 mA/W, detectivity (D) of 0.11×1010 Jones, and response times of â¼2176/â¼257 ms. When adding the ITO layer, the R and D are greatly improved to 0.426 A/W and 5.17×1010 Jones, which gets an increment of 1.08×105% and 4.7×103%, respectively. Meanwhile, the response times are reduced to â¼130/â¼125 ms, and a good environmental stability is obtained. Moreover, it is found that the photoresponse is strongly dependent on the thickness of the MAPbBr3 layer. By modulating the MAPbBr3 layer thickness from â¼85 to â¼590 nm, the performances are further improved with the best R of â¼0.87 A/W, D of â¼1.92×1011 Jones, and response times of â¼129/â¼130 ms achieved in the â¼215 nm-thick PD.
Full text:
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Express
Journal subject:
OFTALMOLOGIA
Year:
2022
Document type:
Article