An ultraviolet radiation sensor using differential spectral response of silicon photodiodes

Yhang Ricardo Sipauba Carvalho Da Silva, Yasumasa Koda, Satoshi Nasuno, Rihito Kuroda, Shigetoshi Sugawa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)


An ultraviolet (UV) sensor is demonstrated with high sensitivity in the UV waveband and low sensitivity in the visible (VIS) and near-infrared (NIR) wavebands, utilizing only bulk silicon technology. The developed sensor utilizes the differential spectral response of photodiodes (PDs) with a high UV sensitivity (PD1) and a low UV sensitivity (PD2), for UV signal extraction under a VIS and NIR light background. To suppress the effects of incident light spatial strength distribution over the sensor, PD1 and PD2 were arranged in a checkered pattern of 8×6 PDs. High Signal to Noise Ratio (SNR) for UV signal extraction was achieved by a developed prototype UV sensor circuit consisted of charge amplifiers connected to PDs and a differential amplifier. The fabricated PD chip has a total area of 1.2 mm2, PD1 and PD2 showed a sensitivity of 0.16 A/W and 0.02 A/W at 310 nm, respectively. The spectral response of the UV sensor was measured and the UV waveband selective sensitivity was successfully obtained.

Original languageEnglish
Title of host publication2015 IEEE SENSORS - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982028
Publication statusPublished - 2015 Dec 31
Event14th IEEE SENSORS - Busan, Korea, Republic of
Duration: 2015 Nov 12015 Nov 4

Publication series

Name2015 IEEE SENSORS - Proceedings


Conference14th IEEE SENSORS
Country/TerritoryKorea, Republic of


  • differential spectral response
  • photodiode
  • silicon
  • ultraviolet light


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