{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["He R"],"funding":["Fundamental Research Funds for the Central Universities","Science and Technology Development Fund, Macao SAR","Natural Science Foundation of China","UM's Research Fund","Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University","Shenzhen-Hong Kong-Macao Science and Technology Innovation Project","National Natural Science Foundation of China","Science and Technology Program of Sichuan Province","National Key Research and Development Program of China","Natural Science Foundation of Jiangsu Province"],"pagination":["e2203210"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9799022"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["9(36)"],"pubmed_abstract":["Surface post-treatment using ammonium halides effectively reduces large open-circuit voltage (V<sub>OC</sub> ) losses in bromine-rich wide-bandgap (WBG) perovskite solar cells (PSCs). However, the underlying mechanism still remains unclear and the device efficiency lags largely behind. Here, a facile strategy of precisely tailoring the phase purity of 2D perovskites on top of 3D WBG perovskite and realizing high device efficiency is reported. The transient absorption spectra, cross-sectional confocal photoluminescence mapping, and cross-sectional Kelvin probe force microscopy are combined to demonstrate optimal defect passivation effect and surface electric-field of pure n = 1 2D perovskites formed atop 3D WBG perovskites via low-temperature annealing. As a result, the inverted champion device with 1.77-eV perovskite absorber achieves a high V<sub>OC</sub> of 1.284 V and a power conversion efficiency (PCE) of 17.72%, delivering the smallest V<sub>OC</sub> deficit of 0.486 V among WBG PSCs with a bandgap higher than 1.75 eV. This enables one to achieve a four-terminal all-perovskite tandem solar cell with a PCE exceeding 25% by combining with a 1.25-eV low-bandgap PSC."],"journal":["Advanced science (Weinheim, Baden-Wurttemberg, Germany)"],"pubmed_title":["Pure 2D Perovskite Formation by Interfacial Engineering Yields a High Open-Circuit Voltage beyond 1.28 V for 1.77-eV Wide-Bandgap Perovskite Solar Cells."],"pmcid":["PMC9799022"],"funding_grant_id":["2019YFE0120000","BK20190825","0082/2021/A2","62005188","KJS1909","2020JDJQ0030","61935017","2019KJT0120-2019ZDZX0015","FDCT-0044/2020/A1","2020YFH0079","62174112","YJ201955","62175268","SGDX2020110309360100","MYRG2020-00151-IAPME","YJ2021157","61904152"],"pubmed_authors":["Yi Z","Lai H","Wang C","Huang H","Zou B","Chen C","He R","Xing G","Fu F","Luo J","Wei Q","Cui G","Luo Y","Wang W","Zhao D","Xiao C","Ren S"],"additional_accession":[]},"is_claimable":false,"name":"Pure 2D Perovskite Formation by Interfacial Engineering Yields a High Open-Circuit Voltage beyond 1.28 V for 1.77-eV Wide-Bandgap Perovskite Solar Cells.","description":"Surface post-treatment using ammonium halides effectively reduces large open-circuit voltage (V<sub>OC</sub> ) losses in bromine-rich wide-bandgap (WBG) perovskite solar cells (PSCs). However, the underlying mechanism still remains unclear and the device efficiency lags largely behind. Here, a facile strategy of precisely tailoring the phase purity of 2D perovskites on top of 3D WBG perovskite and realizing high device efficiency is reported. The transient absorption spectra, cross-sectional confocal photoluminescence mapping, and cross-sectional Kelvin probe force microscopy are combined to demonstrate optimal defect passivation effect and surface electric-field of pure n = 1 2D perovskites formed atop 3D WBG perovskites via low-temperature annealing. As a result, the inverted champion device with 1.77-eV perovskite absorber achieves a high V<sub>OC</sub> of 1.284 V and a power conversion efficiency (PCE) of 17.72%, delivering the smallest V<sub>OC</sub> deficit of 0.486 V among WBG PSCs with a bandgap higher than 1.75 eV. This enables one to achieve a four-terminal all-perovskite tandem solar cell with a PCE exceeding 25% by combining with a 1.25-eV low-bandgap PSC.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Dec","modification":"2025-04-22T04:30:34.948Z","creation":"2025-04-05T21:00:39.579Z"},"accession":"S-EPMC9799022","cross_references":{"pubmed":["36372551"],"doi":["10.1002/advs.202203210"]}}