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Photoelectric Properties of GaS1-xSex (0 ≤ x ≤ 1) Layered Crystals.
Shih, Yu-Tai; Lin, Der-Yuh; Tseng, Bo-Chang; Huang, Ting-Chen; Kao, Yee-Mou; Kao, Ming-Cheng; Hwang, Sheng-Beng.
Afiliação
  • Shih YT; Department of Physics, National Changhua University of Education, Changhua 500207, Taiwan.
  • Lin DY; Department of Electronic Engineering, National Changhua University of Education, Changhua 500208, Taiwan.
  • Tseng BC; Graduate Institute of Photonics, National Changhua University of Education, Changhua 500207, Taiwan.
  • Huang TC; Department of Physics, National Changhua University of Education, Changhua 500207, Taiwan.
  • Kao YM; Department of Physics, National Changhua University of Education, Changhua 500207, Taiwan.
  • Kao MC; Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan.
  • Hwang SB; Department of Electronic Engineering, Chienkuo Technology University, Changhua 500020, Taiwan.
Nanomaterials (Basel) ; 14(8)2024 Apr 18.
Article em En | MEDLINE | ID: mdl-38668195
ABSTRACT
In this study, the photoelectric properties of a complete series of GaS1-xSex (0 ≤ x ≤ 1) layered crystals are investigated. The photoconductivity spectra indicate a decreasing bandgap of GaS1-xSex as the Se composition x increases. Time-resolved photocurrent measurements reveal a significant improvement in the response of GaS1-xSex to light with increasing x. Frequency-dependent photocurrent measurements demonstrate that both pure GaS crystals and GaS1-xSex ternary alloy crystals exhibit a rapid decrease in photocurrents with increasing illumination frequency. Crystals with lower x exhibit a faster decrease in photocurrent. However, pure GaSe crystal maintains its photocurrent significantly even at high frequencies. Measurements for laser-power-dependent photoresponsivity and bias-voltage-dependent photoresponsivity also indicate an increase in the photoresponsivity of GaS1-xSex as x increases. Overall, the photoresponsive performance of GaS1-xSex is enhanced with increasing x, and pure GaSe exhibits the best performance. This result contradicts the findings of previous reports. Additionally, the inverse trends between bandgap and photoresponsivity with increasing x suggest that GaS1-xSex-based photodetectors could potentially offer a high response and wavelength-selectivity for UV and visible light detection. Thus, this work provides novel insights into the photoelectric characteristics of GaS1-xSex layered crystals and highlights their potential for optoelectronic applications.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Taiwan

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Taiwan