Controllable Growth of Perovskite Films by Room-Temperature Air Exposure for Efficient Planar Heterojunction Photovoltaic Cells

Yang, Bin; Dyck, Ondrej; Poplawsky, Jonathan; Keum, Jong; Das, Sanjib; Puretzky, Alexander; Aytug, Tolga; Joshi, Pooran C.; Rouleau, Christopher M.; Duscher, Gerd; Geohegan, David B.; Xiao, Kai

doi:10.1002/anie.201505882

Title: Controllable Growth of Perovskite Films by Room-Temperature Air Exposure for Efficient Planar Heterojunction Photovoltaic Cells

Journal Article · Tue Dec 01 00:00:00 EST 2015 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.201505882· OSTI ID:1279393

Yang, Bin ^[1]; Dyck, Ondrej ^[2]; Poplawsky, Jonathan ^[1]; Keum, Jong ^[1]; Das, Sanjib ^[2]; Puretzky, Alexander ^[1]; Aytug, Tolga ^[1]; Joshi, Pooran C. ^[1]; Rouleau, Christopher M. ^[1]; Duscher, Gerd ^[2]; Geohegan, David B. ^[1]; Xiao, Kai ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)

A two-step-solution-processing approach has been established to grow void-free perovskite films for low-cost and high-performance planar heterojunction photovoltaic devices. We generally applied a high-temperature thermal annealing treatment in order to drive the diffusion of CH₃NH₃I precursor molecules into the compact PbI₂ layer to form perovskite films. But, thermal annealing for extended periods would lead to degraded device performance due to the defects generated by decomposition of perovskite into PbI₂. In this work, we explored a controllable layer-by-layer spin-coating method to grow bilayer CH₃NH₃I/PbI₂ films, and then drive the interdiffusion between PbI₂ and CH₃NH₃I layers by a simple room-temperature-air-exposure for making well-oriented, highly-crystalline perovskite films without thermal annealing. This high degree of crystallinity resulted in a carrier diffusion length of ~ 800 nm and high device efficiency of 15.6%, which is comparable to the reported values from thermally-annealed perovskite films based counterparts. Finally, the simplicity and high device performance of this processing approach is highly promising for direct integration into industrial-scale device manufacture.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1279393

Alternate ID(s):: OSTI ID: 1786131

Journal Information:: Angewandte Chemie (International Edition), Vol. 54, Issue 49; ISSN 1433-7851

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 37 works

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Methodologies for high efficiency perovskite solar cells Park, Nam-Gyu Nano Convergence, Vol. 3, Issue 1 https://doi.org/10.1186/s40580-016-0074-x	journal	June 2016
A perspective on the recent progress in solution-processed methods for highly efficient perovskite solar cells Chilvery, Ashwith; Das, Sanjib; Guggilla, Padmaja Science and Technology of Advanced Materials, Vol. 17, Issue 1 https://doi.org/10.1080/14686996.2016.1226120	journal	October 2016
Structure and Growth Control of Organic-Inorganic Halide Perovskites for Optoelectronics: From Polycrystalline Films to Single Crystals Chen, Yani; He, Minhong; Peng, Jiajun Advanced Science, Vol. 3, Issue 4 https://doi.org/10.1002/advs.201500392	journal	March 2016
Semitransparent CH ₃ NH ₃ PbI ₃ Films Achieved by Solvent Engineering for Annealing- and Electron Transport Layer-Free Planar Perovskite Solar Cells Wei, Xiangfeng; Zhang, Mengmeng; Liu, Xiaoqian Solar RRL, Vol. 2, Issue 6 https://doi.org/10.1002/solr.201700222	journal	March 2018
Dew point temperature as an invariant replacement for relative humidity for advanced perovskite solar cell fabrication systems Ko, Yohan; Lee, Chanyong; Kim, Youbin Journal of Materials Chemistry A, Vol. 6, Issue 42 https://doi.org/10.1039/c8ta06689b	journal	January 2018
Unravelling the effects of oxidation state of interstitial iodine and oxygen passivation on charge trapping and recombination in CH ₃ NH ₃ PbI ₃ perovskite: a time-domain ab initio study He, Jinlu; Fang, Wei-Hai; Long, Run Chemical Science, Vol. 10, Issue 43 https://doi.org/10.1039/c9sc02353d	journal	January 2019
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