Homoepitaxial ZnSe MIS photodetectors with SiO2 and BST insulator layers

T. K. Lin, S. J. Chang, Y. Z. Chiou, C. K. Wang, S. P. Chang, K. T. Lam, Y. S. Sun, B. R. Huang

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


ZnSe metal-insulator-semiconductor (MIS) photodetectors with SiO2 and Ba0.25Sr0.75TiO3 (BST) insulator layers were fabricated on ZnSe substrates. It was found that dark current densities of these MIS photodetectors were at least one order of magnitude smaller than ZnSe Schottky barrier photodetector without the insulator layers. UV-to-visible rejection ratios of these MIS photodetectors were also large, and the noise equivalent power (NEP) was 1.24 × 10-13 and 1.9 × 10-13 for the homoepitaxial ZnSe MIS photodetectors with SiO2 and BST insulator layers, respectively. The corresponding normalized detectivity (D*) was 2.55 × 1012 and 1.67 × 1012 cm Hz0.5 W-1, respectively. These values were better than those observed from the heteroepitaxial ZnSe photodetectors prepared on GaAs substrates.

Original languageEnglish
Pages (from-to)750-753
Number of pages4
JournalSolid-State Electronics
Issue number5
Publication statusPublished - 2006 May

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry


Dive into the research topics of 'Homoepitaxial ZnSe MIS photodetectors with SiO2 and BST insulator layers'. Together they form a unique fingerprint.

Cite this