Journal article
Stable Formamidinium‐Based Centimeter Long Two‐Dimensional Lead Halide Perovskite Single‐Crystal for Long‐Live Optoelectronic Applications
Solution-processable 2D metal-halide perovskites are highly promising for cost-effective optoelectronic applications due to their intrinsic multiquantum well structure. However, the lack of stability is still a major obstacle in the use of this class of materials in practical devices. Here, the authors demonstrate the stable optoelectronic properties using formamidinium (FA)-based centimeter-long 2D perovskite (BA)2FAPb2I7 high-quality single-crystal controlled by the thickness of two perovskite layers.
The large area single-crystal exhibits good crystallinity, phase purity, and spectral uniformity. Moreover, the (BA)2FAPb2I7 single-crystal shows excellent stability at open atmospheric conditions when compared to methylammonium (MA)-based (BA)2MAPb2I7 counterparts. The photodetectors fabricated using 2D perovskite single-crystal on the rigid Si/SiO2 substrate reveal high photoresponsivity (Rλ)(≈5 A W−1), the fast response time (<20 ms), specific detectivity (D*) (≈3.5 × 1011 Jones), and excellent durability under 488 nm laser illumination.
The Rλ and D* values are obtained from the (BA)2FAPb2I7 single-crystal 25 times and three orders magnitudes, respectively, higher than the (BA)2MAPb2I7 single-crystal. Additionally, the perovskite material on flexible polymer substrate reveals good photo-sensing properties in both bending and nonbending states.
Language: | English |
---|---|
Year: | 2021 |
Pages: | 2112277 |
ISSN: | 16163028 and 1616301x |
Types: | Journal article |
DOI: | 10.1002/adfm.202112277 |
ORCIDs: | Ulaganathan, Rajesh Kumar , 0000-0003-3521-4255 , 0000-0001-8427-6626 and 0000-0003-4702-2517 |