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Crystal Size Effect on Carrier Transport of Microscale Perovskite Junctions via Soft Contact
Cited 19 time in
Web of Science
Cited 19 time in Scopus
- Authors
- Issue Date
- 2020-12
- Publisher
- American Chemical Society
- Citation
- Nano Letters, Vol.20 No.12, pp.8640-8646
- Abstract
- To reduce the size of optoelectronic devices, it is essential to understand the crystal size effect on the carrier transport through microscale materials. Here, we show a soft contact method to probe the properties of irregularly shaped microscale perovskite crystals by employing a movable liquid metal electrode to form a self-adaptative deformable electrode-perovskite-electrode junction. Accordingly, we demonstrate that (1) the photocurrents of perovskite quantum dot films and microplatelets show profound differences regarding both the on/off ratio and the response time upon light illumination; and (2) small-size perovskite (<50 mu m) junctions may show negative differential resistance (NDR) behavior, whereas the NDR phenomenon is absent in large-size perovskite junctions within the same bias regime. Our studies provide a method for studying arbitrary-shaped crystals without mechanical damage, assisting the understanding of the photogenerated carriers transport through microscale crystals.
- ISSN
- 1530-6984
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