Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber

Hyeok Chan Kwon, Wooseok Yang, Daehee Lee, Jihoon Ahn, Eunsong Lee, Sunihl Ma, Kyungmi Kim, Seong Cheol Yun, Jooho Moon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Organometal halide perovskite materials have become an exciting research topic as manifested by intense development of thin film solar cells. Although high-performance solar-cell-based planar and mesoscopic configurations have been reported, one-dimensional (1-D) nanostructured perovskite solar cells are rarely investigated despite their expected promising optoelectrical properties, such as enhanced charge transport/extraction. Herein, we have analyzed the 1-D nanostructure effects of organometal halide perovskite (CH3NH3PbI3-xClx) on recombination and charge carrier dynamics by utilizing a nanoporous anodized alumina oxide scaffold to fabricate a vertically aligned 1-D nanopillared array with controllable diameters. It was observed that the 1-D perovskite exhibits faster charge transport/extraction characteristics, lower defect density, and lower bulk resistance than the planar counterpart. As the aspect ratio increases in the 1-D structures, in addition, the charge transport/extraction rate is enhanced and the resistance further decreases. However, when the aspect ratio reaches 6.67 (diameter ~30 nm), the recombination rate is aggravated due to high interface-to-volume ratio-induced defect generation. To obtain the full benefits of 1-D perovskite nanostructuring, our study provides a design rule to choose the appropriate aspect ratio of 1-D perovskite structures for improved photovoltaic and other optoelectrical applications.

Original languageEnglish
Article number10.1021/acsnano.7b07559
Pages (from-to)4233−4245
Number of pages13
JournalACS Nano
Volume12
Issue number5
DOIs
Publication statusPublished - 2018 Apr 20

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Charge carriers
Perovskite
aspect ratio
charge carriers
absorbers
solar cells
halides
Charge transfer
Aspect ratio
defects
aluminum oxides
Aluminum Oxide
Defect density
oxides
Scaffolds
Oxides
thin films
configurations
Nanostructures
Solar cells

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Kwon, H. C., Yang, W., Lee, D., Ahn, J., Lee, E., Ma, S., ... Moon, J. (2018). Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber. ACS Nano, 12(5), 4233−4245. [10.1021/acsnano.7b07559]. https://doi.org/10.1021/acsnano.7b07559
Kwon, Hyeok Chan ; Yang, Wooseok ; Lee, Daehee ; Ahn, Jihoon ; Lee, Eunsong ; Ma, Sunihl ; Kim, Kyungmi ; Yun, Seong Cheol ; Moon, Jooho. / Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber. In: ACS Nano. 2018 ; Vol. 12, No. 5. pp. 4233−4245.
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Kwon, HC, Yang, W, Lee, D, Ahn, J, Lee, E, Ma, S, Kim, K, Yun, SC & Moon, J 2018, 'Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber', ACS Nano, vol. 12, no. 5, 10.1021/acsnano.7b07559, pp. 4233−4245. https://doi.org/10.1021/acsnano.7b07559

Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber. / Kwon, Hyeok Chan; Yang, Wooseok; Lee, Daehee; Ahn, Jihoon; Lee, Eunsong; Ma, Sunihl; Kim, Kyungmi; Yun, Seong Cheol; Moon, Jooho.

In: ACS Nano, Vol. 12, No. 5, 10.1021/acsnano.7b07559, 20.04.2018, p. 4233−4245.

Research output: Contribution to journalArticle

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AU - Kwon, Hyeok Chan

AU - Yang, Wooseok

AU - Lee, Daehee

AU - Ahn, Jihoon

AU - Lee, Eunsong

AU - Ma, Sunihl

AU - Kim, Kyungmi

AU - Yun, Seong Cheol

AU - Moon, Jooho

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Kwon HC, Yang W, Lee D, Ahn J, Lee E, Ma S et al. Investigating Recombination and Charge Carrier Dynamics in a One-Dimensional Nanopillared Perovskite Absorber. ACS Nano. 2018 Apr 20;12(5):4233−4245. 10.1021/acsnano.7b07559. https://doi.org/10.1021/acsnano.7b07559