The persistency of passivation and scalable uniformity are vital issues that limit the improvement of performance and stability of large-area perovskite solar modules(PSMs).Here,we design a bilayer interface engineeri...The persistency of passivation and scalable uniformity are vital issues that limit the improvement of performance and stability of large-area perovskite solar modules(PSMs).Here,we design a bilayer interface engineering strategy that takes advantage of the stability and passivation ability of low-dimensional perovskite and the dipole layer.Introducing phenethylammonium iodide(PEAI)can form 2D/3D heterojunctions on the perovskite surface and effectively passivate defects of perovskite film.Interestingly,the upper piperazinium iodide(PI)layer can still form surface dipoles on the 2D/3D perovskite surface to optimize energy-level alignment.Moreover,the bilayer interface engineering enables large-area perovskite films with uniform surface morphology,lower trap-state density and stability against environmental stress factors.The final devices achieved a small-area PCE of 25.20% and a large-area(1 cm^(2))PCE of 23.96%.A perovskite mini-module(5×5 cm^(2) with an active area of 14.28 cm^(2))could also be fabricated to achieve a PCE of 23.19%,ranking it among the highest for inverted PSMs.Additionally,the device could retain over 93% of its initial efficiency after MPP tracking at 45℃ for 1280 h.This study successfully demonstrates a bilayer interface engineering with respective functions,offering valuable insights for producing efficient and stable large-area PSCs.展开更多
基金the APRC Grant of the City University of Hong Kong(9380086)the TCFS Grant(GHP/018/20SZ)and MRP Grant(MRP/040/21X)from the Innovation and Technology Commission of Hong Kong+3 种基金the Green Tech Fund(202020164)from the Environment and Ecology Bureau of Hong Kongthe GRF grants(11307621,11316422)from the Research Grants Council of Hong KongGuangdong Major Project of Basic and Applied Basic Research(2019B030302007)Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials(2019B121205002).
文摘The persistency of passivation and scalable uniformity are vital issues that limit the improvement of performance and stability of large-area perovskite solar modules(PSMs).Here,we design a bilayer interface engineering strategy that takes advantage of the stability and passivation ability of low-dimensional perovskite and the dipole layer.Introducing phenethylammonium iodide(PEAI)can form 2D/3D heterojunctions on the perovskite surface and effectively passivate defects of perovskite film.Interestingly,the upper piperazinium iodide(PI)layer can still form surface dipoles on the 2D/3D perovskite surface to optimize energy-level alignment.Moreover,the bilayer interface engineering enables large-area perovskite films with uniform surface morphology,lower trap-state density and stability against environmental stress factors.The final devices achieved a small-area PCE of 25.20% and a large-area(1 cm^(2))PCE of 23.96%.A perovskite mini-module(5×5 cm^(2) with an active area of 14.28 cm^(2))could also be fabricated to achieve a PCE of 23.19%,ranking it among the highest for inverted PSMs.Additionally,the device could retain over 93% of its initial efficiency after MPP tracking at 45℃ for 1280 h.This study successfully demonstrates a bilayer interface engineering with respective functions,offering valuable insights for producing efficient and stable large-area PSCs.
