Thermosetting Polyurethane Resins as Low-Cost, Easily Scalable, and Effective Oxygen and Moisture Barriers for Perovskite Solar Cells
| Autor: | Sergio Castro-Hermosa, Claudia Barolo, Luca Bonandini, Matteo Bonomo, Marco Zanetti, Alberto Menozzi, Babak Taheri, Thomas M. Brown, Francesca Brunetti |
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| Rok vydání: | 2020 |
| Předmět: |
water vapor barrier
Materials science perovskite solar cells polyurethanes encapsulation oxygen barrier water vapor barrier Settore ING-INF/01 polyurethanes Thermosetting polymer 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy perovskite solar cells oxygen barrier chemistry.chemical_compound Thermal General Materials Science In situ polymerization Polyurethane Moisture encapsulation Energy conversion efficiency Humidity 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Adhesive 0210 nano-technology Research Article |
| Zdroj: | ACS Applied Materials & Interfaces |
| ISSN: | 1944-8244 |
| DOI: | 10.1021/acsami.0c17652 |
| Popis: | Long-term stability of perovskite solar cells (PSCs) is one of the main issues to be solved for forthcoming commercialization of this technology. In this work, thermosetting polyurethane (PU)-based resins are proposed as effective encapsulants for perovskite solar cells to prevent degradation caused by both moisture and oxygen. Application consists of drop-casting the precursor mixture directly over the devices followed by in situ polymerization, avoiding the use of other adhesives. PUs are cost-effective, lightweight, thermal, and light-stable materials whose mechanical, chemical, and physical properties can be easily tuned by thoughtful choice of their precursor. Encapsulated PSCs show extremely good stability when stored under ambient light (maximum, 1000 lux), controlled humidity (28-65%), and temperature (18-30 °C) by retaining 94% of the initial power conversion efficiency after 2500 h (4 months), whereas control devices lose 90% of their performance after 500 h (T80 = 37 h); once stored according to ISOS-D-1, PU-protected devices showed T80 > 1200 h. Encapsulated devices are stable even when immersed in pure water. The demonstration of PUs as promising solution-processed encapsulant materials for PSCs can pave the way for these to become a cost-effective encapsulation route alternative for future industrialization of this technology. |
| Databáze: | OpenAIRE |
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