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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry

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Nanochannel-Assisted Perovskite Nanowires: From Growth Mechanisms to Photodetector Applications

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Title
Nanochannel-Assisted Perovskite Nanowires: From Growth Mechanisms to Photodetector Applications
Author
Zhou, QitaoPark, Jun GyuNie, RimingThokchom, Ashish KumarHa, DogyeongPan, JingSeok, Sang IlKim, Taesung
Issue Date
2018-08
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.12, no.8, pp.8406 - 8414
Abstract
Growing interest in hybrid organic-inorganic lead halide perovskites has led to the development of various perovskite nanowires (NWs), which have potential use in a wide range of applications, including lasers, photodetectors, and light-emitting diodes (LEDs). However, existing nanofabrication approaches lack the ability to control the number, location, orientation, and properties of perovskite NWs. Their growth mechanism also remains elusive. Here, we demonstrate a micro/nanofluidic fabrication technique (MNFFT) enabling both precise control and in situ monitoring of the growth of perovskite NWs. The initial nucleation point and subsequent growth path of a methylammonium lead iodide-dimethylformamide (MAPbI3·DMF) NW array can be guided by a nanochannel. In situ UV-vis absorption spectra are measured in real time, permitting the study of the growth mechanism of the DMF-mediated crystallization of MAPbI3. As an example of an application of the MNFFT, we demonstrate a highly sensitive MAPbI3-NW-based photodetector on both solid and flexible substrates, showing the potential of the MNFFT for low-cost, large-scale, highly efficient, and flexible optoelectronic applications.
URI
https://scholarworks.unist.ac.kr/handle/201301/24858
URL
https://pubs.acs.org/doi/10.1021/acsnano.8b03826
DOI
10.1021/acsnano.8b03826
ISSN
1936-0851
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