AI Article Synopsis
- - Wide-bandgap perovskites are potential game-changers for tandem solar cells, helping to exceed the Shockley-Queisser limit while being cost-effective; however, stability issues arise from mixed halide perovskites.
- - Electrospray deposition technique is introduced to improve the growth process by ensuring better anion diffusion, enhancing the uniformity of perovskite films which ultimately boosts the performance of solar cells.
- - Achieving impressive power conversion efficiencies (PCEs) of 21.44% and 20.77% in small and larger devices, these solar cells retain 90% of their initial efficiency even after 1550 hours of testing under continuous sunlight conditions.
Article Abstract
Wide-bandgap perovskites are promising absorbers for state-of-the-art tandem solar cells to feasibly surpass Shockley-Queisser limit with low cost. However, the commonly used mixed halide perovskites suffer from poor stability; particularly, photoinduced phase segregation. Electrospray deposition is developed to bridge the gap of growth rate between iodide and bromide components during film growth by spatially confining the anion diffusion and eliminating the kinetic difference, which universally improves the initial homogeneity of perovskite films regardless of device architectures. It thus promotes the efficiency and stability of corresponding solar cells based on wide-bandgap (1.68 eV) absorbers. Remarkable power conversion efficiencies (PCEs) of 21.44% and 20.77% are achieved in 0.08 cm and 1.0 cm devices, respectively. In addition, these devices maintain 90% of their initial PCE after 1550 h of stabilized power output (SPO) tracking upon one sun irradiation (LED) at room temperature.
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| http://dx.doi.org/10.1002/adma.202305822 | DOI Listing |
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