Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing

Jung Hwan Lee; Dongguen Shin; Ryan Rhee; Sangeun Yun; Kyung Mun Yeom; Do Hyung Chun; Sunje Lee; Dongho Kim; Yeonjin Yi; Jun Hong Noh; Jong Hyeok Park

doi:10.1021/acs.jpclett.9b02488

Band Alignment Engineering between Planar SnO₂ and Halide Perovskites via Two-Step Annealing

Jung Hwan Lee, Dongguen Shin, Ryan Rhee, Sangeun Yun, Kyung Mun Yeom, Do Hyung Chun, Sunje Lee, Dongho Kim, Yeonjin Yi, Jun Hong Noh, Jong Hyeok Park

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Managing defects in SnO₂ is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO_2-based perovskite solar cells have inherent defects in the SnO₂ layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO₂ with different annealing temperatures can simultaneously form a SnO₂ layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO₂ layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO₂ layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO₂-based perovskite solar cells with stabilized and improved photovoltaic performances.

Original language	English
Pages (from-to)	6545-6550
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	10
Issue number	21
DOIs	https://doi.org/10.1021/acs.jpclett.9b02488
Publication status	Published - 2019 Nov 7

ASJC Scopus subject areas

Materials Science(all)
Physical and Theoretical Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.jpclett.9b02488

Cite this

@article{175b3035a0ff4afbb3421d46f36febd1,

title = "Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing",

abstract = "Managing defects in SnO2 is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO2-based perovskite solar cells have inherent defects in the SnO2 layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO2 with different annealing temperatures can simultaneously form a SnO2 layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO2 layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO2 layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO2-based perovskite solar cells with stabilized and improved photovoltaic performances.",

author = "Lee, {Jung Hwan} and Dongguen Shin and Ryan Rhee and Sangeun Yun and Yeom, {Kyung Mun} and Chun, {Do Hyung} and Sunje Lee and Dongho Kim and Yeonjin Yi and Noh, {Jun Hong} and Park, {Jong Hyeok}",

note = "Funding Information: We gratefully acknowledge support from the National Research Foundation of Korea (NRF) grant funded by the Korean government (2018M1A3A3A02065974, NRF-2012M3A6A7054861). This work was also partially supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resources from the Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea (20163010012450, 20173010013340). Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

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T1 - Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing

AU - Lee, Jung Hwan

AU - Shin, Dongguen

AU - Rhee, Ryan

AU - Yun, Sangeun

AU - Yeom, Kyung Mun

AU - Chun, Do Hyung

AU - Lee, Sunje

AU - Kim, Dongho

AU - Yi, Yeonjin

AU - Noh, Jun Hong

AU - Park, Jong Hyeok

N1 - Funding Information: We gratefully acknowledge support from the National Research Foundation of Korea (NRF) grant funded by the Korean government (2018M1A3A3A02065974, NRF-2012M3A6A7054861). This work was also partially supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resources from the Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea (20163010012450, 20173010013340). Publisher Copyright: Copyright © 2019 American Chemical Society.

PY - 2019/11/7

Y1 - 2019/11/7

N2 - Managing defects in SnO2 is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO2-based perovskite solar cells have inherent defects in the SnO2 layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO2 with different annealing temperatures can simultaneously form a SnO2 layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO2 layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO2 layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO2-based perovskite solar cells with stabilized and improved photovoltaic performances.

AB - Managing defects in SnO2 is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnO2-based perovskite solar cells have inherent defects in the SnO2 layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO2 with different annealing temperatures can simultaneously form a SnO2 layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO2 layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO2 layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO2-based perovskite solar cells with stabilized and improved photovoltaic performances.

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