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Suppressing Interfacial Recombination with a Strong‐Interaction Surface Modulator for Efficient Inverted Perovskite Solar Cells
,
Jun Deng,
Joel A. Smith,
Pietro Caprioglio,
Kangyu Ji,
Deying Luo,
James McGettrick ,
K. D. G. Imalka Jayawardena,
Rachel C. Kilbride,
Aobo Ren,
Steven Hinder,
Jinxin Bi,
Thomas Webb,
Igor Marko,
Xueping Liu,
Yuren Xiang,
Josh Reding,
Hui Li,
Shixuan Du,
David G. Lidzey,
Samuel D. Stranks,
Trystan Watson ,
Stephen Sweeney,
Henry J. Snaith,
S. Ravi P. Silva,
Wei Zhang
Advanced Energy Materials, Volume: 12, Issue: 48, Start page: 2202868
Swansea University Authors:
James McGettrick , Trystan Watson
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DOI (Published version): 10.1002/aenm.202202868
Abstract
Successful manipulation of halide perovskite surfaces is typically achieved via the interactions between modulators and perovskites. Herein, it is demonstrated that a strong-interaction surface modulator is beneficial to reduce interfacial recombination losses in inverted (p-i-n) perovskite solar ce...
| Published in: | Advanced Energy Materials |
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| ISSN: | 1614-6832 1614-6840 |
| Published: |
Wiley
2022
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa61965 |
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| Abstract: |
Successful manipulation of halide perovskite surfaces is typically achieved via the interactions between modulators and perovskites. Herein, it is demonstrated that a strong-interaction surface modulator is beneficial to reduce interfacial recombination losses in inverted (p-i-n) perovskite solar cells (IPSCs). Two organic ammonium salts are investigated, consisting of 4-hydroxyphenethylammonium iodide and 2-thiopheneethylammonium iodide (2-TEAI). Without thermal annealing, these two modulators can recover the photoluminescence quantum yield of the neat perovskite film in contact with fullerene electron transport layer (ETL). Compared to the hydroxyl-functionalized phenethylammonium moiety, the thienylammonium facilitates the formation of a quasi-2D structure onto the perovskite. Density functional theory and quasi-Fermi level splitting calculations reveal that the 2-TEAI has a stronger interaction with the perovskite surface, contributing to more suppressed non-radiative recombination at the perovskite/ETL interface and improved open-circuit voltage (VOC) of the fabricated IPSCs. As a result, the VOC increases from 1.11 to 1.20 V (based on a perovskite bandgap of 1.63 eV), yielding a power conversion efficiency (PCE) from ≈20% to 21.9% (stabilized PCE of 21.3%, the highest reported PCEs for IPSCs employing poly[N,N′′-bis(4-butylphenyl)-N,N′′-bis(phenyl)benzidine] as the hole transport layer, alongside the enhanced operational and shelf-life stability for unencapsulated devices. |
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| Keywords: |
inverted perovskite solar cells; molecular design, ligands; non-radiative recombination; surface manipulation |
| College: |
Faculty of Science and Engineering |
| Funders: |
EPSRC. Grant Number: EP/V027131/1
Newton Advanced Fellowship. Grant Number: 192097
China Scholarship Council. Grant Numbers: 201706020158, 760949
Equal Opportunities Foundation Hong Kong
Fujian Key Laboratory of Photoelectric Functional Materials. Grant Number: FJPFM-201902
University of Surrey
DCSA3 scholarship
EPSRC SPECIFIC IKC. Grant Number: EP/N020863/1
UK EPSRC. Grant Number: EP/S009213/1
Royal Society
Engineering and Physical Sciences Research Council. Grant Numbers: EP/R023980/1, EP/V027131/1
European Research Council
European Union's Horizon 2020. Grant Number: 756962
Royal Society
Tata Group. Grant Number: UF150033
State Key Laboratory of Advanced Materials and Electronic Components, Guangdong Fenghua Advanced Technology Holding. Grant Number: 201901
Key Technologies Research and Development Program. Grant Number: 2019YFB1503500
European Commission H2020 CORNET program. Grant Number: 760949
Chinese Government Scholarship. Grant Number: 201808370197 |
| Issue: |
48 |
| Start Page: |
2202868 |