Song, Kai, Ma, Nan, Mishra, Yogendra Kumar, Adelung, Rainer and Yang, Ya (2018) Achieving Light-Induced Ultrahigh Pyroelectric Charge Density Toward Self-Powered UV Light Detection. Advanced Electronic Materials, 5 (1). p. 1800413. DOI 10.1002/aelm.201800413.

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Abstract

From the ferroelectric material family, BaTiO3 (BTO) demonstrates quite excellent pyroelectric features due to its inherent intrinsic spontaneous polarization capability. The pyroelectric effect induced by ultraviolet (UV) illumination can be utilized to realize the self‐powered detection of the UV light, where the photosensing characteristics can be determined by the change in charge density with time. Here, a method to increase the charge density by removing the underneath substrate and reducing the device thickness is reported. A floating BTO‐based device with thickness of ≈0.35 mm demonstrates an ultrahigh charge density of ≈1787.2 nC cm−2 under 365 nm light illumination, which is almost 11.4 times higher than that of a 0.85 mm thick BTO device on Al2O3 substrate. These reported findings establish a new strategy for enhancing the charge density of the BTO‐based devices with improved responses, which will be very helpful in upgrading the performances of future technological devices in optoelectronic devices and energy harvesters.

Document Type:	Article
Research affiliation:	Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	Wiley
Projects:	Future Ocean
Date Deposited:	01 Aug 2019 10:03
Last Modified:	02 Jan 2020 12:25
URI:	https://oceanrep.geomar.de/id/eprint/47296

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