A Ferroelectric Ultraviolet Detector With Constructive Photovoltaic Outputs

作者：Gan Bee Keen^*; Yao Kui; Lai Szu Cheng; Goh Phoi Chin; Chen Yi Fan

来源：IEEE Electron Device Letters, 2011, 32(5): 665-667.

DOI：10.1109/LED.2011.2119461

• Ferroelectric devices
• photodetectors
• photovoltaic effects
• thin films

Photovoltaic outputs in semiconductor photodetectors are typically generated at an interfacial space charge region. Here, the output of our ultraviolet detector was enhanced by incorporating a photovoltaic output over the bulk of a ferroelectric thin film for providing a constructive photovoltaic effect in addition to the response from the interfacial mechanism. The working principle was demonstrated with a ferroelectric (Pb0.97La0.03)(Zr0.52Ti0.48)O-3 (PLZT) thin film sandwiched between a (La0.7Sr0.3)MnO3 top electrode and a Pt bottom electrode, in which the depolarization electric field in the PLZT film was in the same direction with that at the Schottky barrier at the PLZT/Pt interface to realize the constructive photovoltaic effect.

• 出版日期2011-5