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Pàgina inicial > Articles > Articles publicats > Enabling full-scale grain boundary mitigation in polycrystalline perovskite solids |
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 |
12 p, 2.1 MB |