journal article·2022-05-25

Colossal In-Plane and Out-of-Plane Shift Photocurrents in Single-Layer Two-Dimensional α-Antimonide Phosphorus

Ngeywo Tolbert Kaner, Yadong Wei, Ali Raza, Weiqi Li, YongYuan Jiang, Wei Quan Tian

ACS Applied Materials & Interfaces· Volume 14· Issue 20
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Abstract

For materials lacking inversion symmetries, an interband transition induced by a photon may result in excited electrons (holes) experiencing a spatial shift leading to generation of directional photocurrents. This phenomenon known as bulk photovoltaic effect (BPVE) shift photocurrent (SPC) has recently attracted immense attention owing to its potential in generating photovoltages that are not restricted by Shockley-Queisser limitations imposed by materials' electronic band gaps. The BPVE was recently reformulated in a quantum mechanics viewpoint as the change in the geometrical phase upon photoexcitation and can now be promptly calculated from Bloch wave functions generated by first-principles calculations. The SPC of an electron (hole) is robust against crystal defects and impurities both in the interior and the surface and can be less dissipative and ultrafast. Herein, an emergence of colossal SPC in a pristine two-dimensional (2D) single-layer α-SbP crystal is predicted from first-principles calculations. An external electric field is further applied on the 2D crystal, and a large SPC enhancement is achieved. The locations of the SPC peaks due to both in-plane and out-of-plane responses suggest that α-SbP can generate a large photocurrent both in visible-light and ultraviolet regions. Single-layer 2D α-SbP is thus an excellent material for strong SPC. This finding is thus expected to open a pathway to exploring efficient photovoltaic devices based on monolayer α-SbP and similar materials.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · Topological Materials and Phenomena · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics, Harbin Institute of Technology, Harbin 150001, China

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Technology Innovation Center of Materials and Devices at Extreme Environment, Harbin 150001, China

Department of Physics, University of Sialkot (USKT), 1-Km Main Daska Road, Sialkot 51040, Punjab, Pakistan

State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an 710024, China

Key Lab of Micro-Optics and Photonic Technology of Heilongjiang Province, Harbin 150001, China

Key Laboratory of Micro-Nano Optoelectronic Information System, Ministry of Industry and Information Technology, Harbin 150001, China

Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Chongqing Key Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China

Funding

State Key Laboratory of Supramolecular Structure and Materials · National Natural Science Foundation of China · Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University · State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology Shannxi

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