Details

Autor(en) / Beteiligte

• Wang, Xingang
• Xiong, Tao
• Zhao, Kai
• Zhou, Ziqi
• Xin, Kaiyao
• Deng, Hui‐Xiong
• Kang, Jun
• Yang, Juehan
• Liu, Yue‐Yang
• Wei, Zhongming

Titel

Polarimetric Image Sensor and Fermi Level Shifting Induced Multichannel Transition Based on 2D PdPS

Ist Teil von

• Advanced materials (Weinheim), 2022-01, Vol.34 (2), p.e2107206-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• 2D materials have been attracting high interest in recent years due to their low structural symmetry, excellent photoresponse, and high air stability. However, most 2D materials can only respond to specific light, which limits the development of wide‐spectrum photodetectors. Proper bandgap and the regulation of Fermi level are the foundations for realizing electronic multichannel transition, which is an effective method to achieve a wide spectral response. Herein, a noble 2D material, palladium phosphide sulfide (PdPS), is designed and synthesized. The bandgap of PdPS is around 2.1 eV and the formation of S vacancies, interstitial Pd and P atoms promote the Fermi level very close to the conduction band. Therefore, the PdPS‐based photodetector shows impressive wide spectral response from solar‐blind ultraviolet to near‐infrared based on the multichannel transition. It also exhibits superior optoelectrical properties with photoresponsivity (R) of 1 × 103 A W−1 and detectivity (D*) of 4 × 1011 Jones at 532 nm. Moreover, PdPS exhibits good performance of polarization detection with dichroic ratio of ≈3.7 at 808 nm. Significantly, it achieves polarimetric imaging and hidden‐target detection in complex environments through active detection. A wide spectral response photodetector and polarimetric image sensor based on 2D palladium phosphide sulfide (PdPS) are designed. The photoresponse range of PdPS is from solar‐blind ultraviolet to the near‐infrared. The PdPS‐based polarimetric imaging sensor achieves object imaging and hidden‐target detection in complex environments.