New UV-enhanced solar blind optical sensors based on monocrystalline zinc sulphide

Alexander Malik, Ana Sêco, Elvira Fortunato, Rodrigo Martins

Research output: Contribution to journalConference articlepeer-review

20 Citations (Scopus)


UV-enhanced monocrystalline zinc sulphide optical sensors with high quantum efficiency have been developed by spray deposition of heavy fluorine-doped tin oxide (FTO) thin films onto the surface of zinc sulphide monocrystals as an alternative to the UV-enhanced high-efficiency silicon photodetectors commonly used in precise radiometric and spectroscopic measurements as well as to new sensors based on SiC and GaN. The fabricated sensors have an unbiased internal quantum efficiency that is nearly 100% from 250 to 320 nm, and the typical sensitivity at 250 nm is 0.15 A W-1. The sensors are insensitive to solar radiation in conditions on the earth and can be used as solar blind photodetectors for precision UV measurements under direct solar illumination for both terrestrial and space applications.

Original languageEnglish
Pages (from-to)68-71
Number of pages4
JournalSensors and Actuators A: Physical
Issue number1-3
Publication statusPublished - 15 May 1998
EventEUROSENSORS XI Meeting - Warsaw, Poland
Duration: 21 Sep 199724 Sep 1997


  • Heterojunctions
  • Optical sensors
  • Semiconductors
  • Zinc sulphide


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