Enabling full-scale grain boundary mitigation in polycrystalline perovskite solids
Zhao, Lichen (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics)
Tang, PengYi (Institut Català de Nanociència i Nanotecnologia)
Luo, Deying (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics)
Dar, Ibrahim (University of Cambridge. Department of Physics)
Eickemeyer, Felix (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces)
Arora, Neha (University of Cambridge. Department of Physics)
Hu, Qin (University of Massachusetts. Polymer Science and Engineering Department)
Luo, Jingshan (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces)
Liu, Yuhang (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces)
Zakeeruddin, Shaik Mohammed (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces)
Hagfeldt, Anders (École Polytechnique Fédérale de Lausanne. Laboratory of Photomolecular Science)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Huang, Wei (Nanjing Tech University. Key Laboratory of Flexible Electronics & Institute of Advanced Materials)
Gong, Qihuang (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics)
Russell, Thomas (University of Massachusetts. Polymer Science and Engineering Department)
Friend, Richard Henry (University of Cambridge. Department of Physics)
Grätzel, Michael (École Polytechnique Fédérale de Lausanne. Laboratory of Photonics and Interfaces)
Zhu, Rui (Peking University. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics)

Data:	2022
Resum:	There exists a considerable density of interaggregate grain boundaries (GBs) and intra-aggregate GBs in polycrystalline perovskites. Mitigation of intra-aggregate GBs is equally notable to that of interaggregate GBs as intra-aggregate GBs can also cause detrimental effects on the photovoltaic performances of perovskite solar cells (PSCs). Here, we demonstrate full-scale GB mitigation ranging from nanoscale intra-aggregate to submicron-scale interaggregate GBs, by modulating the crystallization kinetics using a judiciously designed brominated arylamine trimer. The optimized GB-mitigated perovskite films exhibit reduced nonradiative recombination, and their corresponding mesostructured PSCs show substantially enhanced device efficiency and long-term stability under illumination, humidity, or heat stress. The versatility of our strategy is also verified upon applying it to different categories of PSCs. Our discovery not only specifies a rarely addressed perspective concerning fundamental studies of perovskites at nanoscale but also opens a route to obtain high-quality solution-processed polycrystalline perovskites for high-performance optoelectronic devices.
Ajuts:	Ministerio de Economía y Competitividad ENE2017-85087-C3. ICN2 Ministerio de Economía y Competitividad SEV-2017-0706 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327
Nota:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Aggregate grains ; Aryl amines ; Grain-boundaries ; Nano scale ; Nonradiative recombination ; Perovskite films ; Perovskite solids ; Photovoltaic performance ; Polycrystalline perovskite ; Submicron scale
Publicat a:	Science advances, Vol. 8, issue 35 (Sep. 2022) , art. eabo3733, ISSN 2375-2548

DOI: 10.1126/sciadv.abo3733
PMID: 36054361

12 p, 2.1 MB

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