journal article·2024-07-12

Tuning Performance of Heterojunction Flexible Photodetectors by Energy Band Alignment Engineering

Muhammad Zubair Nawaz, Muhammad Bilal, Hafsa Gulzar, Huma Gulzar, Rana Zafar Abbas Manj, Muhammad Shahrukh Saleem, Israr Masood ul Hasan, Muhammad Amir Rafiq, Gul Naz, H. M. Noor ul Huda Khan Asghar, Muhammad Javed, Mai Li

ACS Applied Nano Materials· Volume 7· Issue 13
Publisher page

Abstract

Exploring innovative constituents in one-dimensional (1D) nanomaterials and integrating them with two-dimensional (2D) van der Waals (vdW) materials are in high demand as a unique platform for discovering new physical phenomena and designing innovative interface-based devices. This work demonstrates for the first time a supersensitive flexible broadband photodetector based on a hybrid 1D/2D heterojunction that integrates the synergetic properties of a 1D CdS x Se 1– x nanobelt and a 2D PbI 2 flake and systematically investigates their stoichiometric-dependent photoelectric response. The fabricated hybrid 1 D /2D heterojunction device significantly boosts the light current while suppressing the dark current to the pA scale, enabling a high responsivity of 10 5 A/W. The remarkable photoresponse performance is ascribed to efficient charge carrier transfer between the 1D CdS x Se 1– x nanobelt and the 2D PbI 2 flake resulting from energy band alignment engineering. Meanwhile, the proposed hybrid 1D/2D heterojunction can be fabricated with a flexible tape substrate.
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Research context

OpenAlex topics: Photonic and Optical Devices · Semiconductor Quantum Structures and Devices · Advanced Semiconductor Detectors and Materials

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

Affiliations

College of Science and Shanghai Institute of Intelligent Electronics and Systems, Donghua University, Shanghai 201620, China

Laboratory of 2D Optoelectronics and Nanoelectronics (L2DON), Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Computer and Information Sciences, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad 45650, Pakistan

Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China

College of Life Sciences, China Agricultural University, Beijing 100083, China

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institutes of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan

Department of Physics, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta 87300, Pakistan

State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China

Funding

Southern University of Science and Technology

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