Localized Surface Plasmon Resonance Enhanced Light Absorption in AuCu/CsPbCl3 Core/Shell Nanocrystals
Abstract
Localized surface plasmon resonance (LSPR) is shown to be effective in trapping light for enhanced light absorption and hence performance in photonic and optoelectronic devices. Implementation of LSPR in all‐inorganic perovskite nanocrystals (PNCs) is particularly important considering their unique advantages in optoelectronics. Motivated by this, the first success in colloidal synthesis of AuCu/CsPbCl3 core/shell PNCs and observation of enhanced light absorption by the perovskite CsPbCl3 shell of thickness in the range of 2–4 nm, enabled by the LSPR AuCu core of an average diameter of 7.1 nm, is reported. This enhanced light absorption leads to a remarkably enhanced photoresponse in PNCs/graphene nanohybrid photodetectors using the AuCu/CsPbCl3 core/shell PNCs, by more than 30 times as compared to the counterparts with CsPbCl3 PNCs only (8–12 nm in dimension). This result illustrates the feasibility in implementation of LSPR light trapping directly in core/shell PNCs for high‐performance optoelectronics.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 25, 2020
- Source ID
- 10.1002/adma.202002163
Entities
People
- Dan Ewing
- Judy Z. Wu
- Maogang Gong
- Mohammed Alamri
- Seyed M Sadeghi
Organizations
- Army Research Office
- Honeywell Federal Manufacturing and Technologies (United States)
- National Science Foundation
- United States Department of Energy
- University of Alabama in Huntsville
- University of Kansas