首页|Interfacial engineering through lead binding using crown ethers in perovskite solar cells

Interfacial engineering through lead binding using crown ethers in perovskite solar cells

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In the domain of perovskite solar cells(PSCs),the imperative to reconcile impressive photovoltaic perfor-mance with lead-related issue and environmental stability has driven innovative solutions.This study pioneers an approach that not only rectifies lead leakage but also places paramount importance on the attainment of rigorous interfacial passivation.Crown ethers,notably benzo-18-crown-6-ether(B18C6),were strategically integrated at the perovskite-hole transport material interface.Crown ethers exhibit a dual role:efficiently sequestering and immobilizing Pb2+ions through host-guest complexation and simultaneously establishing a robust interfacial passivation layer.Selected crown ether candidates,guided by density functional theory(DFT)calculations,demonstrated proficiency in binding Pb2+ions and optimizing interfacial energetics.Photovoltaic devices incorporating these materials achieved excep-tional power conversion efficiency(PCE),notably 21.7％for B18C6,underscoring their efficacy in lead binding and interfacial passivation.Analytical techniques,including time-of-flight secondary ion mass spectrometry(ToF-SIMS),ultraviolet photoelectron spectroscopy(UPS),time-resolved photolumines-cence(TRPL),and transient absorption spectroscopy(TAS),unequivocally affirmed Pb2+ion capture and suppression of non-radiative recombination.Notably,these PSCs maintained efficiency even after enduring 300 h of exposure to 85％relative humidity.This research underscores the transformative potential of crown ethers,simultaneously addressing lead binding and stringent interfacial passivation for sustainable PSCs poised to commercialize and advance renewable energy applications.

Perovskite solar cellsInterfacial passivationCrown ether materialsStability

Sun-Ju Kim、YeonJu Kim、Ramesh Kumar Chitumalla、Gayoung Ham、Thanh-Danh Nguyen、Joonkyung Jang、Hyojung Cha、Jovana Mili?、Jun-Ho Yum、Kevin Sivula、Ji-Youn Seo

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Department of Nano Fusion Technology,Pusan National University,Busan 46241,Republic of Korea

Laboratory for Molecular Engineering of Optoelectronic Nanomaterials,Institute of Chemical Sciences and Engineering,École Poly technique Fédérale de Lausanne(EPFL),1015 Lausanne,Switzerland

Department of Energy Convergence and Climate Change,Kyungpook National University,Daegu 41566,Republic of Korea

Department of Hydrogen and Renewable Energy,Kyungpook National University,Daegu 41566,Republic of Korea

Adolphe Merkle Institute,University of Fribourg,CH-1700 Fribourg,Switzerland

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Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of EducationMinistry of Trade,Industry and Energy(MOTIE)Korea Institute for Advancement of Technology(KIAT)through the International Cooperative R&D programNRF grant funded by the Korea government(MSIT)NRF grant funded by the Korea government(MSIT)

2021R1F1A1047203P00261002021R1I1A1A01061036RS-2023-00213920

2024

10.1016/j.jechem.2024.01.042

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.92(5)