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 journalArticle

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.

Original languageEnglish
Pages (from-to)6545-6550
Number of pages6
JournalJournal of Physical Chemistry Letters
DOIs
Publication statusAccepted/In press - 2019 Jan 1

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perovskites
Conversion efficiency
halides
solar cells
alignment
engineering
Annealing
Coatings
Perovskite
annealing
Defects
coatings
Hysteresis
Solar cells
defects
Physical properties
coating
crystallinity
physical properties
hysteresis

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

Lee, Jung Hwan ; Shin, Dongguen ; Rhee, Ryan ; Yun, Sangeun ; Yeom, Kyung Mun ; Chun, Do Hyung ; Lee, Sunje ; Kim, Dongho ; Yi, Yeonjin ; Noh, Jun Hong ; Park, Jong Hyeok. / Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing. In: Journal of Physical Chemistry Letters. 2019 ; pp. 6545-6550.
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Band Alignment Engineering between Planar SnO2 and Halide Perovskites via Two-Step Annealing. / Lee, Jung Hwan; Shin, Dongguen; Rhee, Ryan; Yun, Sangeun; Yeom, Kyung Mun; Chun, Do Hyung; Lee, Sunje; Kim, Dongho; Yi, Yeonjin; Noh, Jun Hong; Park, Jong Hyeok.

In: Journal of Physical Chemistry Letters, 01.01.2019, p. 6545-6550.

Research output: Contribution to journalArticle

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AU - Shin, Dongguen

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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

PY - 2019/1/1

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