Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation

Tanghao Liu, Yuanyuan Zhou, Zhen Li, Lin Zhang, Ming Gang Ju, Deying Luo, Ye Yang, Mengjin Yang, Dong Hoe Kim, Wenqiang Yang, Nitin P. Padture, Matthew C. Beard, Xiao C Zeng, Kai Zhu, Qihuang Gong, Rui Zhu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Formamidinium (FA)-based lead iodide perovskites have emerged as the most promising light-absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase-instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA-based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA-based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge-carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment-theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000-h storage under ambient conditions.

Original languageEnglish (US)
JournalAdvanced Energy Materials
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Encapsulation
Perovskite
Silicon Dioxide
Silica
Iodides
Crystallization
Charge carriers
Hydrolysis
Lead
Degradation
Perovskite solar cells
perovskite
formamidine
Experiments

Keywords

  • Charge transport
  • Encapsulate
  • Perovskite
  • Silica
  • Stability

ASJC Scopus subject areas

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

Cite this

Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation. / Liu, Tanghao; Zhou, Yuanyuan; Li, Zhen; Zhang, Lin; Ju, Ming Gang; Luo, Deying; Yang, Ye; Yang, Mengjin; Kim, Dong Hoe; Yang, Wenqiang; Padture, Nitin P.; Beard, Matthew C.; Zeng, Xiao C; Zhu, Kai; Gong, Qihuang; Zhu, Rui.

In: Advanced Energy Materials, 01.01.2018.

Research output: Contribution to journalArticle

Liu, T, Zhou, Y, Li, Z, Zhang, L, Ju, MG, Luo, D, Yang, Y, Yang, M, Kim, DH, Yang, W, Padture, NP, Beard, MC, Zeng, XC, Zhu, K, Gong, Q & Zhu, R 2018, 'Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation', Advanced Energy Materials. https://doi.org/10.1002/aenm.201800232
Liu, Tanghao ; Zhou, Yuanyuan ; Li, Zhen ; Zhang, Lin ; Ju, Ming Gang ; Luo, Deying ; Yang, Ye ; Yang, Mengjin ; Kim, Dong Hoe ; Yang, Wenqiang ; Padture, Nitin P. ; Beard, Matthew C. ; Zeng, Xiao C ; Zhu, Kai ; Gong, Qihuang ; Zhu, Rui. / Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation. In: Advanced Energy Materials. 2018.
@article{174063a0001344c2b83830ace9c7a9bc,
title = "Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation",
abstract = "Formamidinium (FA)-based lead iodide perovskites have emerged as the most promising light-absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase-instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA-based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA-based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge-carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment-theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20{\%} with an impressive 97{\%} retention after 1000-h storage under ambient conditions.",
keywords = "Charge transport, Encapsulate, Perovskite, Silica, Stability",
author = "Tanghao Liu and Yuanyuan Zhou and Zhen Li and Lin Zhang and Ju, {Ming Gang} and Deying Luo and Ye Yang and Mengjin Yang and Kim, {Dong Hoe} and Wenqiang Yang and Padture, {Nitin P.} and Beard, {Matthew C.} and Zeng, {Xiao C} and Kai Zhu and Qihuang Gong and Rui Zhu",
year = "2018",
month = "1",
day = "1",
doi = "10.1002/aenm.201800232",
language = "English (US)",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",

}

TY - JOUR

T1 - Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation

AU - Liu, Tanghao

AU - Zhou, Yuanyuan

AU - Li, Zhen

AU - Zhang, Lin

AU - Ju, Ming Gang

AU - Luo, Deying

AU - Yang, Ye

AU - Yang, Mengjin

AU - Kim, Dong Hoe

AU - Yang, Wenqiang

AU - Padture, Nitin P.

AU - Beard, Matthew C.

AU - Zeng, Xiao C

AU - Zhu, Kai

AU - Gong, Qihuang

AU - Zhu, Rui

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Formamidinium (FA)-based lead iodide perovskites have emerged as the most promising light-absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase-instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA-based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA-based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge-carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment-theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000-h storage under ambient conditions.

AB - Formamidinium (FA)-based lead iodide perovskites have emerged as the most promising light-absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase-instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA-based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA-based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge-carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment-theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000-h storage under ambient conditions.

KW - Charge transport

KW - Encapsulate

KW - Perovskite

KW - Silica

KW - Stability

UR - http://www.scopus.com/inward/record.url?scp=85047802922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047802922&partnerID=8YFLogxK

U2 - 10.1002/aenm.201800232

DO - 10.1002/aenm.201800232

M3 - Article

JO - Advanced Energy Materials

JF - Advanced Energy Materials

SN - 1614-6832

ER -