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)2FAPb2I77 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.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: This is the peer reviewed version of the following article: 'Ulaganathan, R. K., Murugesan, R. C., Lin, C.-Y., et al (2021). Stable Formamidinium-Based Centimeter Long Two-Dimensional Lead Halide Perovskite Single-Crystal for Long-Live Optoelectronic Applications. Advanced Functional Materials', which has been published in final form at []. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Uncontrolled Keywords: ambient stability,flexible electronics,photoresponsivity,specific detectivity,two-dimensional perovskites,Condensed Matter Physics,Chemistry(all),Materials Science(all)
Publication ISSN: 1616-3028
Last Modified: 10 Apr 2024 07:19
Date Deposited: 17 Jan 2022 17:22
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Related URLs: https://onlinel ... /adfm.202112277 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-12-31
Published Online Date: 2021-12-31
Accepted Date: 2021-12-01
Authors: Ulaganathan, Rajesh Kumar
Murugesan, Raghavan Chinnambedu (ORCID Profile 0000-0003-3521-4255)
Lin, Chang‐yu
Subramanian, Ambika
Chen, Wei‐liang
Chang, Yu‐ming
Rozhin, Alex (ORCID Profile 0000-0003-2271-8227)
Sankar, Raman



Version: Accepted Version

License: ["licenses_description_unspecified" not defined]

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