Bifacial structures of ZnS humidity sensor and Cd-free CIGS photovoltaic cell as a self-powered device

Han Ting Hsueh; Yu Jen Hsiao; Yu De Lin; Chung Lin Wu

doi:10.1109/LED.2014.2361648

Bifacial structures of ZnS humidity sensor and Cd-free CIGS photovoltaic cell as a self-powered device

Han Ting Hsueh, Yu Jen Hsiao, Yu De Lin, Chung Lin Wu

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In this letter, a ZnS humidity sensor was integrated with MgF₂/ZnS/CuIn_1-xGa_xSe₂ (CIGS)/Mo photovoltaic cell as a self-powered device. Both the ZnS layers of this bifacial device were deposited at the same time by a one-step process. This ZnS layer not only serves as the buffer layer of the CIGS photovoltaic cell on the upside, but is also used as the humidity sensing material on the backside. Under 1-sun illumination, the humidity current increased monotonically from 0.045 to 12.63 nA as we increased the related humidity (RH) from 30% to 95%. At RH 95%, the humidity current decreased from 13.1 to 4.93 nA while the illumination decreased from 1 to 0.1 sun. These results indicate that this device is of practical use as a self-powered humidity sensor.

Original language	English
Article number	6932445
Pages (from-to)	1272-1274
Number of pages	3
Journal	IEEE Electron Device Letters
Volume	35
Issue number	12
DOIs	https://doi.org/10.1109/LED.2014.2361648
Publication status	Published - 2014 Dec 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/LED.2014.2361648

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abstract = "In this letter, a ZnS humidity sensor was integrated with MgF2/ZnS/CuIn1-xGaxSe2 (CIGS)/Mo photovoltaic cell as a self-powered device. Both the ZnS layers of this bifacial device were deposited at the same time by a one-step process. This ZnS layer not only serves as the buffer layer of the CIGS photovoltaic cell on the upside, but is also used as the humidity sensing material on the backside. Under 1-sun illumination, the humidity current increased monotonically from 0.045 to 12.63 nA as we increased the related humidity (RH) from 30% to 95%. At RH 95%, the humidity current decreased from 13.1 to 4.93 nA while the illumination decreased from 1 to 0.1 sun. These results indicate that this device is of practical use as a self-powered humidity sensor.",

author = "Hsueh, {Han Ting} and Hsiao, {Yu Jen} and Lin, {Yu De} and Wu, {Chung Lin}",

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AU - Wu, Chung Lin

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Bifacial structures of ZnS humidity sensor and Cd-free CIGS photovoltaic cell as a self-powered device

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