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Multichannel Interdiffusion Driven FASnI3 Film Formation Using Aqueous Hybrid Salt/Polymer Solutions toward Flexible Lead-Free Perovskite Solar Cells

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [4];  [4];  [5];  [1];  [4]
  1. Xi'an Jiaotong Univ. (China)
  2. Xi'an Jiaotong Univ. (China); Shanxi Univ. (China)
  3. Xi'an Jiaotong Univ. (China); Northwestern Univ., Evanston, IL (United States)
  4. Northwestern Univ., Evanston, IL (United States)
  5. Northwestern Univ., Evanston, IL (United States); Mitsubishi Chemical Group Science & Technology Research Center, Inc., Yokohama (Japan)
Tin (Sn)-based perovskites are increasingly attractive because they offer lead-free alternatives in perovskite solar cells. Yet, depositing high-quality Sn-based perovskite films is still a challenge, particularly for low-temperature planar heterojunction (PHJ) devices. In this work, a “multichannel interdiffusion” protocol is demonstrated by annealing stacked layers of aqueous solution deposited formamidinium iodide (FAI)/polymer layer followed with an evaporated SnI2 layer to create uniform FASnI3 films. In this protocol, tiny FAI crystals, significantly inhibited by the introduced polymer, can offer multiple interdiffusion pathways for complete reaction with SnI2. What is more, water, rather than traditional aprotic organic solvents, is used to dissolve the precursors. The best-performing FASnI3 PHJ solar cell assembled by this protocol exhibits a power conversion efficiency (PCE) of 3.98%. In addition, a flexible FASnI3-based flexible solar cell assembled on a polyethylene naphthalate–indium tin oxide flexible substrate with a PCE of 3.12% is demonstrated. This novel interdiffusion process can aid to further boost the performance of lead-free Sn-based perovskites.
Research Organization:
Northwestern Univ., Evanston, IL (United States). Energy Frontier Research Center (EFRC) Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Organization:
China Scholarship Council; National Natural Science Foundation of China (NNSFC); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001059
OSTI ID:
1470367
Alternate ID(s):
OSTI ID: 1401076
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 23 Vol. 29; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Charge Transport between Coupling Colloidal Perovskite Quantum Dots Assisted by Functional Conjugated Ligands journal April 2018
Recent Advances in Flexible Perovskite Solar Cells: Fabrication and Applications journal February 2019
Lead‐Free Halide Perovskite Nanocrystals: Crystal Structures, Synthesis, Stabilities, and Optical Properties journal January 2020
High-Quality Cs 2 AgBiBr 6 Double Perovskite Film for Lead-Free Inverted Planar Heterojunction Solar Cells with 2.2 % Efficiency journal May 2018
Acquiring High-Performance and Stable Mixed-Dimensional Perovskite Solar Cells by Using a Transition-Metal-Substituted Pb Precursor journal August 2018
Post‐Treatment Engineering of Vacuum‐Deposited Cs 2 NaBiI 6 Double Perovskite Film for Enhanced Photovoltaic Performance journal October 2019
Recent Progress of Flexible Perovskite Solar Cells journal January 2019
Flexible and Stretchable Perovskite Solar Cells: Device Design and Development Methods journal June 2018
Improving Performance of Lead-Free Formamidinium Tin Triiodide Perovskite Solar Cells by Tin Source Purification journal August 2018
Synergy Effect of Both 2,2,2-Trifluoroethylamine Hydrochloride and SnF 2 for Highly Stable FASnI 3−x Cl x Perovskite Solar Cells journal January 2019
Structurally Stabilizing and Environment Friendly Triggers: Double‐Metallic Lead‐Free Perovskites journal May 2019
Lead‐Free Tin‐Based Perovskite Solar Cells: Strategies Toward High Performance journal May 2019
Present Status and Research Prospects of Tin‐based Perovskite Solar Cells journal August 2019
Recent Advances of Device Components toward Efficient Flexible Perovskite Solar Cells journal January 2020
Progress of High‐Throughput and Low‐Cost Flexible Perovskite Solar Cells journal February 2020
Cadmium sulfide as an efficient electron transport material for inverted planar perovskite solar cells journal January 2018
Recent progress in 2D/quasi-2D layered metal halide perovskites for solar cells journal January 2018
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Influence of phenylethylammonium iodide as additive in the formamidinium tin iodide perovskite on interfacial characteristics and charge carrier dynamics journal March 2019
Influence of phenylethylammonium iodide as additive in the formamidinium tin iodide perovskite on interfacial characteristics and charge carrier dynamics text January 2019