Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells

Kai Zhu; Mengjin Yang; Obadiah Reid; Yue Yu; Zhaoning Song; Dewei Zhao; Changlei Wang; Liwei Li; Yuan Meng; Ted Guo; Yanfa Yan; Donghoe Kim; Zhen Li; Donghoe Kim

doi:10.1016/j.mtener.2017.10.001

Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells

Kai Zhu, Mengjin Yang, Obadiah Reid, Yue Yu, Zhaoning Song, Dewei Zhao, Changlei Wang, Liwei Li, Yuan Meng, Ted Guo, Yanfa Yan, Donghoe Kim, Zhen Li, Donghoe Kim

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

32 Scopus Citations

Abstract

A high-efficiency wide-bandgap (WBG) perovskite solar cell is critical for developing perovskite-related (e.g., all-perovskite, perovskite/Si, or perovskite/Cu(In,Ga)Se₂) tandem devices. Here, we demonstrate the use of non-stoichiometric precursor chemistry with excess methylammonium halides (MAX; X = I, Br, or Cl) for preparing high-quality ∼1.75-eV FA_0.83Cs_0.17Pb(I_0.6Br_0.4)₃ perovskite solar cells. Among various methylammonium halides, using excess MABr in the non-stoichiometric precursor exhibits the strongest effect on improving perovskite crystallographic properties and device characteristics without affecting the perovskite composition. In contrast, using excess MAI significantly reduces the bandgap of perovskite due to the replacement of Br with I. Using 40% excess MABr, we demonstrate a single-junction WBG perovskite solar cell with stabilized efficiency of 16.4%. We further demonstrate a 20.3%-efficient 4-terminal tandem device by using a 14.7%-efficient semi-transparent WBG perovskite top cell and an 18.6%-efficient unfiltered (5.6%-efficient filtered) Si bottom cell.

Original language	American English
Pages (from-to)	232-238
Number of pages	7
Journal	Materials Today Energy
Volume	7
DOIs	https://doi.org/10.1016/j.mtener.2017.10.001 https://doi.org/10.1016/j.mtener.2017.10.001
State	Published - 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

NREL Publication Number

NREL/JA-5900-70019

Keywords

Non-stoichiometric chemistry
Tandem solar cell
Wide bandgap perovskite

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Zhu, K., Yang, M., Reid, O., Yu, Y., Song, Z., Zhao, D., Wang, C., Li, L., Meng, Y., Guo, T., Yan, Y., Kim, D., Li, Z., & Kim, D. (2018). Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells. Materials Today Energy, 7, 232-238. https://doi.org/10.1016/j.mtener.2017.10.001, https://doi.org/10.1016/j.mtener.2017.10.001

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abstract = "A high-efficiency wide-bandgap (WBG) perovskite solar cell is critical for developing perovskite-related (e.g., all-perovskite, perovskite/Si, or perovskite/Cu(In,Ga)Se2) tandem devices. Here, we demonstrate the use of non-stoichiometric precursor chemistry with excess methylammonium halides (MAX; X = I, Br, or Cl) for preparing high-quality ∼1.75-eV FA0.83Cs0.17Pb(I0.6Br0.4)3 perovskite solar cells. Among various methylammonium halides, using excess MABr in the non-stoichiometric precursor exhibits the strongest effect on improving perovskite crystallographic properties and device characteristics without affecting the perovskite composition. In contrast, using excess MAI significantly reduces the bandgap of perovskite due to the replacement of Br with I. Using 40% excess MABr, we demonstrate a single-junction WBG perovskite solar cell with stabilized efficiency of 16.4%. We further demonstrate a 20.3%-efficient 4-terminal tandem device by using a 14.7%-efficient semi-transparent WBG perovskite top cell and an 18.6%-efficient unfiltered (5.6%-efficient filtered) Si bottom cell.",

keywords = "Non-stoichiometric chemistry, Tandem solar cell, Wide bandgap perovskite",

author = "Kai Zhu and Mengjin Yang and Obadiah Reid and Yue Yu and Zhaoning Song and Dewei Zhao and Changlei Wang and Liwei Li and Yuan Meng and Ted Guo and Yanfa Yan and Donghoe Kim and Zhen Li and Donghoe Kim",

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year = "2018",

doi = "10.1016/j.mtener.2017.10.001",

language = "American English",

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pages = "232--238",

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Zhu, K, Yang, M, Reid, O, Yu, Y, Song, Z, Zhao, D, Wang, C, Li, L, Meng, Y, Guo, T, Yan, Y, Kim, D, Li, Z & Kim, D 2018, 'Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells', Materials Today Energy, vol. 7, pp. 232-238. https://doi.org/10.1016/j.mtener.2017.10.001, https://doi.org/10.1016/j.mtener.2017.10.001

TY - JOUR

T1 - Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells

AU - Zhu, Kai

AU - Yang, Mengjin

AU - Reid, Obadiah

AU - Yu, Yue

AU - Song, Zhaoning

AU - Zhao, Dewei

AU - Wang, Changlei

AU - Li, Liwei

AU - Meng, Yuan

AU - Guo, Ted

AU - Yan, Yanfa

AU - Kim, Donghoe

AU - Li, Zhen

AU - Kim, Donghoe

PY - 2018

Y1 - 2018

N2 - A high-efficiency wide-bandgap (WBG) perovskite solar cell is critical for developing perovskite-related (e.g., all-perovskite, perovskite/Si, or perovskite/Cu(In,Ga)Se2) tandem devices. Here, we demonstrate the use of non-stoichiometric precursor chemistry with excess methylammonium halides (MAX; X = I, Br, or Cl) for preparing high-quality ∼1.75-eV FA0.83Cs0.17Pb(I0.6Br0.4)3 perovskite solar cells. Among various methylammonium halides, using excess MABr in the non-stoichiometric precursor exhibits the strongest effect on improving perovskite crystallographic properties and device characteristics without affecting the perovskite composition. In contrast, using excess MAI significantly reduces the bandgap of perovskite due to the replacement of Br with I. Using 40% excess MABr, we demonstrate a single-junction WBG perovskite solar cell with stabilized efficiency of 16.4%. We further demonstrate a 20.3%-efficient 4-terminal tandem device by using a 14.7%-efficient semi-transparent WBG perovskite top cell and an 18.6%-efficient unfiltered (5.6%-efficient filtered) Si bottom cell.

AB - A high-efficiency wide-bandgap (WBG) perovskite solar cell is critical for developing perovskite-related (e.g., all-perovskite, perovskite/Si, or perovskite/Cu(In,Ga)Se2) tandem devices. Here, we demonstrate the use of non-stoichiometric precursor chemistry with excess methylammonium halides (MAX; X = I, Br, or Cl) for preparing high-quality ∼1.75-eV FA0.83Cs0.17Pb(I0.6Br0.4)3 perovskite solar cells. Among various methylammonium halides, using excess MABr in the non-stoichiometric precursor exhibits the strongest effect on improving perovskite crystallographic properties and device characteristics without affecting the perovskite composition. In contrast, using excess MAI significantly reduces the bandgap of perovskite due to the replacement of Br with I. Using 40% excess MABr, we demonstrate a single-junction WBG perovskite solar cell with stabilized efficiency of 16.4%. We further demonstrate a 20.3%-efficient 4-terminal tandem device by using a 14.7%-efficient semi-transparent WBG perovskite top cell and an 18.6%-efficient unfiltered (5.6%-efficient filtered) Si bottom cell.

KW - Non-stoichiometric chemistry

KW - Tandem solar cell

KW - Wide bandgap perovskite

UR - http://www.scopus.com/inward/record.url?scp=85042676490&partnerID=8YFLogxK

U2 - 10.1016/j.mtener.2017.10.001

DO - 10.1016/j.mtener.2017.10.001

M3 - Article

AN - SCOPUS:85042676490

SN - 2468-6069

VL - 7

SP - 232

EP - 238

JO - Materials Today Energy

JF - Materials Today Energy

ER -

Effect of Non-Stoichiometric Solution Chemistry on Improving the Performance of Wide-Bandgap Perovskite Solar Cells

Abstract

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Keywords

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