Single‐Crystal Nanowire Cesium Tin Triiodide Perovskite Solar Cell

Abstract

This work reports for the first time a highly efficient single‐crystal cesium tin triiodide (CsSnI3) perovskite nanowire solar cell. With a perfect lattice structure, low carrier trap density (≈5 × 1010 cm−3), long carrier lifetime (46.7 ns), and excellent carrier mobility (>600 cm2 V−1 s−1), single‐crystal CsSnI3 perovskite nanowires enable a very attractive feature for flexible perovskite photovoltaics to power active micro‐scale electronic devices. Using CsSnI3 single‐crystal nanowire in conjunction with highly conductive wide bandgap semiconductors as front‐surface‐field layers, an unprecedented efficiency of 11.7% under AM 1.5G illumination is achieved. This work demonstrates the feasibility of all‐inorganic tin‐based perovskite solar cells via crystallinity and device‐structure improvement for the high‐performance, and thus paves the way for the energy supply to flexible wearable devices in the future.

High-throughput screening of the transport behavior of tetragonal perovskites

“…The experimental values on CsSnI 3 were m h = 0.25-628 cm 2 V À1 s À1 and m e = 1.05-2320 cm 2 V À1 s À1 . [28][29][30][31][32][33][34][35] Some reported mobilities in experiments were much lower than our theoretical predictions. This investigation predicted the intrinsic mobility, which was the upper limit that the perovskite might achieve.…”

“…Unfortunately, because of unavoidable impurities and technical differences during the experimental process, the measurement results were inconsistent. The experimental mobilities of CsPbI 3 and CsSnI 3 were 1.72-270 cm 2 V À1 s À1 23-27 and 0.25-2320 cm 2 V À1 s À1 , [28][29][30][31][32][33][34][35] respectively. Intrinsic defects caused extra scattering, which reduced mobility.…”

Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells

“…Tremendous efforts have been devoted to the development of high‐performance n–i–p structured (conventional) inorganic perovskite solar cells (PSCs), including optimization of perovskite structure, [ 9,10 ] composition, [ 11–15 ] crystallinity, [ 16–19 ] and interface. [ 20–24 ] As a result, the PCE has been boosted from 2.5% in 2015 [ 25 ] to 21.7% recently.…”

Recent advance of high-quality perovskite nanostructure and its application in flexible photodetectors

“…In 2023, Dai et al reported an all-inorganic single-crystal CsSnI 3 perovskite NWs with a perfect lattice structure, and the HRTEM demonstrated that the singlecrystal CsSnI 3 NWs were grown along the (002) direction (figure 7(a)). Additionally, the CsSnI 3 NWs exhibited low carrier trap density (≈5 × 10 10 cm −3 ), long carrier lifetime (46.7 ns), and excellent carrier mobility (<600 cm 2 V −1 s −1 ) [102]. Taking advantage of the low defect density of perovskite single-crystal NWs, some interesting work was reported.…”