Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 41, Pages 35656-35663Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b13777
Keywords
quantum dots; CuInSe2 QDs; PEDOT:PSS; perovskite; photodetector
Funding
- National Science Foundation of China [51774034, 51772026, 51611130063]
- Beijing Natural Science Foundation [2182039]
- Fundamental Research Funds for the Central Universities [FRF-TP-17-030A1, FRF-TP-17-083A1, FRF-TP-17-082A1, TW2018010]
- China Postdoctoral Science Foundation [2017M620611, 2018M630068]
- Danish Council for Independent Research [7026-0037B]
- Swedish Research Council [2017-05337]
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A novel hybrid hole transport layer (HTL) of CuInSe2 quantum dots (QDs)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was developed to enhance the performance of halide metal perovskite (MAPbI(3))-based photodetectors. The introduction of CuInSe2 QDs not only improved the wettability of the PEDOT:PSS HTL for the growth of perovskite crystals but also facilitated the transportation of holes from the perovskite to the HTL. As a result, both responsivity and detectivity of the device were increased dramatically by CuInSe2 QDs hybrid HTL, showing excellent photoresponsivity of 240 mA/W, larger ratio of photocurrent density to dark current density of 4.1 X 10(6), fast on-off switching properties of <0.02 s, and remarkable detectivity values of 1.02 X 10(13) Jones at 580 nm and above 5.01 X 10(12) Jones over the visible light region without an external bias voltage. In addition, the photodetectors also showed excellent thermal stability in the range of 10-110 degrees C. Therefore, a unique design idea of a hole transport material would be an anticipated direction for efficient halide metal perovskite-based devices.
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