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Near Infrared to Visible Electroluminescent Diodes Based on Organometallic Halide Perovskites: Structural and Optical Investigation

DSpace at IIT Bombay

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Title Near Infrared to Visible Electroluminescent Diodes Based on Organometallic Halide Perovskites: Structural and Optical Investigation
 
Creator KUMAWAT, NK
DEY, A
NARASIMHAN, KL
KABRA, D
 
Subject SOLAR-CELLS
LAYERED-PEROVSKITE
EFFICIENT
DEPOSITION
FILMS
perovskites
structure and morphology
PL efficiency
charge injection/transport
LEDs
 
Description In this paper we present a study of the structural, electrical, and optical properties of four different 3D organometallic halide-based perovskite semiconductors with band gaps varying from NIR to visible at room temperature. Electroluminescent devices (using a solution process) with these perovsldtes as the active layer are also demonstrated. The morphology and crystallinity of the perovskite depends on the halide ion and substrate wetting conditions, where crystallite size varies from similar to 100s nm to few micrometers. We found it has a huge influence on the optical properties and performance of light emitting diodes (LEDs) using these perovskites as the active layer. Photoluminescence studies in the presence of commonly used charge injection layers are also studied and we correlate these results with performance of PeLEDs. We also demonstrate additional control of the electroluminescence emission by the formation of new complexes with organic hole transport layers. Finally, we clarify the diverse electronic charge transport in these perovskites. These results show promise of a new materials regime for LEDs.
 
Publisher AMER CHEMICAL SOC
 
Date 2016-01-15T06:19:30Z
2016-01-15T06:19:30Z
2015
 
Type Article
 
Identifier ACS PHOTONICS, 2(3)349-354
2330-4022
http://dx.doi.org/10.1021/acsphotonics.5b00318
http://dspace.library.iitb.ac.in/jspui/handle/100/17915
 
Language en