Highly Crystalized MAPbX 3 Perovskite Triangular Nanowire Arrays for Optoelectronic Applications.

Here, a facile fabrication approach for high-quality 1D perovskite triangular nanowire (TNW) array synthesis through space-confined effect was reported. A soft stamp containing 1D triangular linear array pattern was used to confine the MAPbX 3 solution and to guide the growth of the nanowires along the prescribed direction with good crystallinity. The further constructed photodetectors based on the obtained MAPbI 3 TNWs, which exhibit superior photoresponse properties with a responsivity of (125.2 ± 2.5) A W -1 and detectivity of (2.8 ± 0.8) × 10 13 Jones at the wavelength of 650 nm. The excellent performance is attributed to the highly crystalline TNW with optical anisotropy and a small asymptotic height, which reduces the probability of photon reflection and promotes carrier transport. More interestingly, the increased surface area of the triangular device can present superior flexibility after a couple of thousands of bending cycles. Furthermore, by fabricating 7 × 7 photodetector arrays, the potential image sensor application was demonstrated. The perovskite nanowire fabrication approach is scalable and compatible with current semiconductor manufacturing, which indicates their great potential in broad applications. This article is protected by copyright. All rights reserved.