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High-Performance Photovoltaic Effect with Electrically Balanced Charge Carriers in Black Phosphorus and WS2 Heterojunction

Title
High-Performance Photovoltaic Effect with Electrically Balanced Charge Carriers in Black Phosphorus and WS2 Heterojunction
Author(s)
Kwak, Do-HyunRa, Hyun-SooJeong, Min-HyeLee, A-YoungLee, Jong-Soo
Issued Date
2018-09
Citation
Advanced Materials Interfaces, v.5, no.18
Type
Article
Author Keywords
charge carrier balanceheterojunction p-n diodesphotovoltaic effectsblack phosphorustungsten disulfide
Keywords
DER-WAALS HETEROSTRUCTURESP-N HETEROJUNCTIONSGATE-TUNABLE DIODEJUNCTIONSPASSIVATIONTRANSPORTGRAPHENEFIELD-EFFECT TRANSISTORS
ISSN
2196-7350
Abstract
2D van der Waals materials are promising for various electronic and optoelectronic devices because of their thickness-dependent mobility and tunable bandgap. Recently, heterojunction structures based on 2D van der Waals materials have exhibited their potential for photovoltaic applications as ultrathin p–n diodes. In this study, the photovoltaic effect of a multilayer black phosphorus (BP)/WS2 p–n heterojunction device is demonstrated under the 405 nm laser illumination and the AM 1.5 solar spectrum. The diode-like characteristics and photovoltaic effect rely on balance between charge carriers in the heterojunction device, by showing the highest performance at the balance position. The gate-tunable heterojunction device shows a high current rectification of 103 and an external quantum efficiency of 4.4% under the 405 nm laser illumination, and a photovoltaic efficiency of 4.6% under the AM 1.5 solar spectrum. This work suggests that the balancing of the charge carriers in the 2D heterojunction p–n diode is highly prioritized to fabricate high-performance photovoltaic device. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
http://hdl.handle.net/20.500.11750/9335
DOI
10.1002/admi.201800671
Publisher
Wiley
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Appears in Collections:
Division of Nanotechnology 1. Journal Articles
Department of Energy Science and Engineering MNEDL(Multifunctional Nanomaterials & Energy Devices Lab) 1. Journal Articles

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