Search: onr:"swepub:oai:DiVA.org:uu-364771" >
Extending the Spect...
Extending the Spectral Responsivity of MoS2 Phototransistors by Incorporating Up-Conversion Microcrystals
-
- Zhang, Youwei (author)
- Uppsala universitet,Fasta tillståndets elektronik
-
Wang, Jiao (author)
-
Wang, Bing (author)
-
show more...
-
Shao, Jinhai (author)
-
Deng, Jianan (author)
-
Cong, Chunxiao (author)
-
Hu, Laigui (author)
-
Tian, Pengfei (author)
-
Liu, Ran (author)
-
- Zhang, Shi-Li (author)
- Uppsala universitet,Fasta tillståndets elektronik
-
Qiu, Zhi-Jun (author)
-
show less...
-
(creator_code:org_t)
- 2018-08-26
- 2018
- English.
-
In: Advanced Optical Materials. - : Wiley. - 2162-7568 .- 2195-1071. ; 6:21
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- Layered 2D semiconductors are characterized by unique photoelectric properties and, therefore, constitute a new class of basic building block for next‐generation optoelectronics. However, their wide bandgaps limit the spectral responsivity to a narrow range. Here, a facile approach is demonstrated by integrating β‐NaYF4:Yb3+, Er3+ up‐conversion microcrystals (UCMCs) with monolayer‐MoS2 phototransistors to break this bandgap‐imposed barrier and to drastically extend the responsivity range. In essence, the UCMCs up‐convert a near‐infrared excitation at 980 nm to visible light of photons with energy matching the large bandgap (i.e., 1.8 eV) of monolayer‐MoS2, thereby activating the phototransistor with remarkable photocurrent and minimum interference. This approach leads to preservation of the excellent electrical merits of monolayer‐MoS2 and simultaneous retention of its low dark current and high photoresponsivity to the above‐bandgap lights. Significantly, an enhancement by over 1000 times is achieved for both responsivity and specific detectivity at 980 nm excitation. Moreover, the rate of response is kept identical to that when the MoS2 phototransistor is excited by a visible light. Therefore, integrating with UCMCs can enable the emerging 2D semiconductors of wide bandgap to respond to infrared excitations with high efficacy and without sacrificing their performance in the visible region.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- molybdenum disulfide
- phototransistors
- spectral responsivity
- up-conversion
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Zhang, Youwei
-
Wang, Jiao
-
Wang, Bing
-
Shao, Jinhai
-
Deng, Jianan
-
Cong, Chunxiao
-
show more...
-
Hu, Laigui
-
Tian, Pengfei
-
Liu, Ran
-
Zhang, Shi-Li
-
Qiu, Zhi-Jun
-
show less...
- About the subject
-
- ENGINEERING AND TECHNOLOGY
-
ENGINEERING AND ...
-
and Electrical Engin ...
-
and Other Electrical ...
- Articles in the publication
-
Advanced Optical ...
- By the university
-
Uppsala University