Journal
ADVANCED MATERIALS
Volume 34, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202203204
Keywords
all-inorganic perovskites; dual passivation; high efficiency devices; perovskite solar cell modules; phase stability
Categories
Funding
- National Research Foundation of Korea (NRF) [2020R1A2C2004880]
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2018R1A6A1A03024334]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2018R1C1B6008218]
- Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016H1D3A1909289]
- Research Foundation - Flanders (FWO) [12Y7221N]
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/S001395/1]
- EPSRC [EP/L000202]
- National Research Foundation of Korea [2020R1A2C2004880] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study reports a dual strategy for efficient and stable all-inorganic perovskite solar cells through bulk and surface passivation treatment. The approach demonstrates excellent performance in both small-area devices and large-area modules.
Realizing photoactive and thermodynamically stable all-inorganic perovskite solar cells (PSCs) remains a challenging task within halide perovskite photovoltaic (PV) research. Here, a dual strategy for realizing efficient inorganic mixed halide perovskite PV devices based on a terbium-doped solar absorber, that is, CsPb1-xTbxI2Br, is reported, which undertakes a bulk and surface passivation treatment in the form of CsPb1-xTbxI2Br quantum dots, to maintain a photoactive gamma-phase under ambient conditions and with significantly improved operational stability. Devices fabricated from these air-processed perovskite thin films exhibit an air-stable power conversion efficiency (PCE) that reaches 17.51% (small-area devices) with negligible hysteresis and maintains >90% of the initial efficiency when operating for 600 h under harsh environmental conditions, stemming from the combined effects of the dual-protection strategy. This approach is further examined within large-area PSC modules (19.8 cm(2) active area) to realize 10.94% PCE and >30 days ambient stability, as well as within low-bandgap gamma-CsPb0.95Tb0.05I2.5Br0.5 (E-g = 1.73 eV) materials, yielding 19.01% (18.43% certified) PCE.
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