Heterojunction-Depleted Lead-Free Perovskite Solar Cells with Coarse-Grained B-γ-CsSnI3 Thin Films

Ning Wang, Yuanyuan Zhou, Ming Gang Ju, Hector F. Garces, Tao Ding, Shuping Pang, Xiao Cheng Zeng, Nitin P. Padture, Xiao Wei Sun

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Perovskite solar cells (PSCs) have been emerging as a breakthrough photovoltaic technology, holding unprecedented promise for low-cost, high-efficiency renewable electricity generation. However, potential toxicity associated with the state-of-the-art lead-containing PSCs has become a major concern. The past research in the development of lead-free PSCs has met with mixed success. Herein, the promise of coarse-grained B-γ-CsSnI3 perovskite thin films as light absorber for efficient lead-free PSCs is demonstrated. Thermally-driven solid-state coarsening of B-γ-CsSnI3 perovskite grains employed here is accompanied by an increase of tin-vacancy concentration in their crystal structure, as supported by first-principles calculations. The optimal device architecture for the efficient photovoltaic operation of these B-γ-CsSnI3 thin films is identified through exploration of several device architectures. Via modulation of the B-γ-CsSnI3 grain coarsening, together with the use of the optimal PSC architecture, planar heterojunction-depleted B-γ-CsSnI3 PSCs with power conversion efficiency up to 3.31% are achieved without the use of any additives. The demonstrated strategies provide guidelines and prospects for developing future high-performance lead-free PVs.

Original languageEnglish (US)
Article number1601130
JournalAdvanced Energy Materials
Volume6
Issue number24
DOIs
StatePublished - Dec 21 2016

Fingerprint

Heterojunctions
Lead
Thin films
Coarsening
Perovskite
Tin
Conversion efficiency
Vacancies
Toxicity
Perovskite solar cells
Electricity
Crystal structure
Modulation
Costs
perovskite

Keywords

  • CsSnI3
  • grain coarsening
  • heterojunction-depleted
  • lead-free
  • perovskite solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Wang, N., Zhou, Y., Ju, M. G., Garces, H. F., Ding, T., Pang, S., ... Sun, X. W. (2016). Heterojunction-Depleted Lead-Free Perovskite Solar Cells with Coarse-Grained B-γ-CsSnI3 Thin Films. Advanced Energy Materials, 6(24), [1601130]. https://doi.org/10.1002/aenm.201601130

Heterojunction-Depleted Lead-Free Perovskite Solar Cells with Coarse-Grained B-γ-CsSnI3 Thin Films. / Wang, Ning; Zhou, Yuanyuan; Ju, Ming Gang; Garces, Hector F.; Ding, Tao; Pang, Shuping; Zeng, Xiao Cheng; Padture, Nitin P.; Sun, Xiao Wei.

In: Advanced Energy Materials, Vol. 6, No. 24, 1601130, 21.12.2016.

Research output: Contribution to journalArticle

Wang, N, Zhou, Y, Ju, MG, Garces, HF, Ding, T, Pang, S, Zeng, XC, Padture, NP & Sun, XW 2016, 'Heterojunction-Depleted Lead-Free Perovskite Solar Cells with Coarse-Grained B-γ-CsSnI3 Thin Films', Advanced Energy Materials, vol. 6, no. 24, 1601130. https://doi.org/10.1002/aenm.201601130
Wang, Ning ; Zhou, Yuanyuan ; Ju, Ming Gang ; Garces, Hector F. ; Ding, Tao ; Pang, Shuping ; Zeng, Xiao Cheng ; Padture, Nitin P. ; Sun, Xiao Wei. / Heterojunction-Depleted Lead-Free Perovskite Solar Cells with Coarse-Grained B-γ-CsSnI3 Thin Films. In: Advanced Energy Materials. 2016 ; Vol. 6, No. 24.
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