Abstract
Electrochromic devices, serving as smart glasses, have not yet been intelligent enough to regulate lighting conditions independent of external photosensing devices. On the other hand, their bulky sandwich structures have been suffering setbacks utilized for reflective displays in an effort to compete with mature emissive displays. The key to resolve both problems lies in incorporating the photosensing function into electrochromic devices while simplifying their configuration via replacing ionic electrolytes. However, so far it has not yet been achieved because of the essential operating difference between the optoelectronic devices and the ionic devices. Herein, a concept of a smarter and thinner device: "electrochromic photodetector" is proposed to solve such problems. It is all-solid-state and electrolyte-free and operates with a simple thin metal-semiconductor-metal structure via an electrolytic mechanism. As a proof of concept, a configuration of the electrochromic photodetector is presented in this work based on a tungsten trioxide (WO3) thin film deposited on Au electrodes via facile, low-cost solution processes. The electrochromic photodetector switches between its photosensing and electrochromic functions via voltage modulation within 5 V, which is the result of the semiconductor-metal transition. The transition mechanism is further analyzed to be the voltage-triggered reversible oxygen/water vapor adsorption/intercalation from ambient air.
| Original language | English |
|---|---|
| Pages (from-to) | 27997-28004 |
| Number of pages | 8 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 11 |
| Issue number | 31 |
| DOIs | |
| Publication status | Published - 7 Aug 2019 |
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Keywords
- electrochromic
- photodetectors
- reflective display
- smart glasses
- tungsten oxide
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Electrochromic Photodetectors : Toward Smarter Glasses and Nano Reflective Displays via an Electrolytic Mechanism. / Hai, Zhenyin; Karbalaei Akbari, Mohammad; Wei, Zihan; Zuallaert, Jasper; De Neve, Wesley; Xue, Chenyang; Xu, Hongyan; Verpoort, Francis; Zhuiykov, Serge.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 31, 07.08.2019, p. 27997-28004.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochromic Photodetectors
T2 - Toward Smarter Glasses and Nano Reflective Displays via an Electrolytic Mechanism
AU - Hai, Zhenyin
AU - Karbalaei Akbari, Mohammad
AU - Wei, Zihan
AU - Zuallaert, Jasper
AU - De Neve, Wesley
AU - Xue, Chenyang
AU - Xu, Hongyan
AU - Verpoort, Francis
AU - Zhuiykov, Serge
PY - 2019/8/7
Y1 - 2019/8/7
N2 - Electrochromic devices, serving as smart glasses, have not yet been intelligent enough to regulate lighting conditions independent of external photosensing devices. On the other hand, their bulky sandwich structures have been suffering setbacks utilized for reflective displays in an effort to compete with mature emissive displays. The key to resolve both problems lies in incorporating the photosensing function into electrochromic devices while simplifying their configuration via replacing ionic electrolytes. However, so far it has not yet been achieved because of the essential operating difference between the optoelectronic devices and the ionic devices. Herein, a concept of a smarter and thinner device: "electrochromic photodetector" is proposed to solve such problems. It is all-solid-state and electrolyte-free and operates with a simple thin metal-semiconductor-metal structure via an electrolytic mechanism. As a proof of concept, a configuration of the electrochromic photodetector is presented in this work based on a tungsten trioxide (WO3) thin film deposited on Au electrodes via facile, low-cost solution processes. The electrochromic photodetector switches between its photosensing and electrochromic functions via voltage modulation within 5 V, which is the result of the semiconductor-metal transition. The transition mechanism is further analyzed to be the voltage-triggered reversible oxygen/water vapor adsorption/intercalation from ambient air.
AB - Electrochromic devices, serving as smart glasses, have not yet been intelligent enough to regulate lighting conditions independent of external photosensing devices. On the other hand, their bulky sandwich structures have been suffering setbacks utilized for reflective displays in an effort to compete with mature emissive displays. The key to resolve both problems lies in incorporating the photosensing function into electrochromic devices while simplifying their configuration via replacing ionic electrolytes. However, so far it has not yet been achieved because of the essential operating difference between the optoelectronic devices and the ionic devices. Herein, a concept of a smarter and thinner device: "electrochromic photodetector" is proposed to solve such problems. It is all-solid-state and electrolyte-free and operates with a simple thin metal-semiconductor-metal structure via an electrolytic mechanism. As a proof of concept, a configuration of the electrochromic photodetector is presented in this work based on a tungsten trioxide (WO3) thin film deposited on Au electrodes via facile, low-cost solution processes. The electrochromic photodetector switches between its photosensing and electrochromic functions via voltage modulation within 5 V, which is the result of the semiconductor-metal transition. The transition mechanism is further analyzed to be the voltage-triggered reversible oxygen/water vapor adsorption/intercalation from ambient air.
KW - electrochromic
KW - photodetectors
KW - reflective display
KW - smart glasses
KW - tungsten oxide
UR - http://www.scopus.com/inward/record.url?scp=85070537397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070537397&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b06555
DO - 10.1021/acsami.9b06555
M3 - Article
C2 - 31302998
AN - SCOPUS:85070537397
VL - 11
SP - 27997
EP - 28004
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 31
ER -