Pyro-Phototronic Effect in n-Si/p-MoO3−x Heterojunction: an Approach to Improve the Photoresponse of the Ultraviolet Photodetector

Vishwa Bhatt, Sanjay Sahare, Manjeet Kumar, Shern Long Lee, Sunil Kumar, Ju Hyung Yun

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The pyro-phototronic effect plays a crucial role in UV photodetection to enhance the overall device performance. Herein, the pyro-phototronic effect is demonstrated for the first time in n-Si/MoO3−x heterostructures. Vertically grown 2D-MoO3−x microstructures are synthesized that show a centrosymmetric structure. Commonly, non-centrosymmetric structures show a pyroelectric polarization effect; however, in the present work, authors have shown such a synergetic effect in a centrosymmetric MoO3−x-based heterojunction. The fabricated device depicts a type I heterojunction that helps to reduce the response time and consequently minimizes charge-carrier recombination losses. UV photodetection is measured with very low power, and significant device performances are observed under varying light intensities. The maximum responsivity and detectivity are attained up to 4.4 mA W−1 and 5.5 (Formula presented.) 1010 Jones under photoelectric effects. Additionally, the maximum responsivity and detectivity are attained up to 7.82 mA W−1 and 1011 Jones under the pyro-phototronic effect. Herein, an in-depth understanding of the pyro-phototronic effect in working phenomenon in type I heterojunction is provided. Such a mechanism can be explored in different heterojunctions to enhance photodetection performance in ultrafast light communications.

Original languageEnglish
Article number2200500
JournalPhysica Status Solidi - Rapid Research Letters
Volume17
Issue number9
DOIs
StatePublished - Sep 2023

Keywords

  • 2D-MoO microstructures
  • pyro-electric effect
  • pyro-phototronic effect
  • type I heterojunctions
  • UV photodetectors

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