Inorganic frameworks of low-dimensional perovskites dictate the performance and stability of mixed-dimensional perovskite solar cells
| Autor: | Benny Febriansyah, Yongxin Li, David Giovanni, Teddy Salim, Thomas J. N. Hooper, Ying Sim, Daphne Ma, Shoba Laxmi, Yulia Lekina, Teck Ming Koh, Ze Xiang Shen, Sumod A. Pullarkat, Tze Chien Sum, Subodh G. Mhaisalkar, Joel W. Ager, Nripan Mathews |
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| Přispěvatelé: | School of Materials Science and Engineering, School of Physical and Mathematical Sciences, Centre of High Field Nuclear Magnetic Resonance (NMR) Spectroscopy and Imaging, NTU, Energy Research Institute @ NTU (ERI@N) |
| Rok vydání: | 2023 |
| Předmět: |
Technology
DISTORTION Science & Technology Chemistry Multidisciplinary Process Chemistry and Technology Materials Science HYBRID PEROVSKITES Materials Science Multidisciplinary Materials::Nanostructured materials [Engineering] RAMAN-SPECTRUM Chemistry Materials::Functional materials [Engineering] Mechanics of Materials Physical Sciences General Materials Science Degradation Mechanism Electrical and Electronic Engineering Materials Structure |
| Zdroj: | Materials Horizons. 10:536-546 |
| ISSN: | 2051-6355 2051-6347 |
| DOI: | 10.1039/d2mh00868h |
| Popis: | Mixed-dimensional perovskites containing mixtures of organic cations hold great promise to deliver highly stable and efficient solar cells. However, although a plethora of relatively bulky organic cations have been reported for such purposes, a fundamental understanding of the materials’ structure, composition, and phase, along with their correlated effects on the corresponding optoelectronic properties and degradation mechanism remains elusive. Herein, we systematically engineer the structures of bulky organic cations to template low-dimensional perovskites with contrasting inorganic framework dimensionality, connectivity, and coordination deformation. By combining X-ray single-crystal structural analysis with depth-profiling XPS, solid-state NMR, and femtosecond transient absorption, it is revealed that not all low dimensional species work equally well as dopants. Instead, it was found that inorganic architectures with lesser structural distortion tend to yield less disordered energetic and defect landscapes in the resulting mixed-dimensional perovskites, augmented in materials with a longer photoluminescence (PL) lifetime, higher PL quantum yield (up to 11%), improved solar cell performance and enhanced thermal stability (T80 up to 1000 h, unencapsulated). Our study highlights the importance of designing templating organic cations that yield low-dimensional materials with much less structural distortion profiles to be used as additives in stable and efficient perovskite solar cells. Ministry of Education (MOE) National Research Foundation (NRF) Published version The authors would like to acknowledge funding from the Singapore National Research Foundation through the IntraCREATE Collaborative Grant (NRF2018-ITC001-001), Energy Innovation Research Program (NRF2015EWT-EIRP003-004 and Solar CRP: S18-1176-SCRP), and MOE Tier 2 project MOE2019-T2-2-097. |
| Databáze: | OpenAIRE |
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