Dark Current Analysis of Vertical p-i-n Photodetectors on a Germanium-on-Insulator Platform
Kwang Hong Lee, Yiding Lin, Bongkwon Son, Chuan Seng Tan
Abstract
Kwang Hong Lee, Yiding Lin, Bongkwon Son, Chuan Seng Tan
Abstract
Dark current of vertical p-i-n photodetectors on a germanium-on-insulator platform was analyzed. The activation energy was found to be from 0.15 to 0.36 eV under reserve bias. The dark current generation was interpreted by Shockley-Read-Hall and trap-assisted-tunneling effects. This work provides the interpretation on germanium-on-insulator photodetectors and suggests the alternative to suppress the dark current generation for Si-based Ge photodetectors.
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Dark current of vertical p-i-n photodetectors on a germanium-on-insulator platform was analyzed. The activation energy was found to be from 0.15 to 0.36 eV under reserve bias. The dark current generation was interpreted by Shockley-Read-Hall and trap-assisted-tunneling effects. This work provides the interpretation on germanium-on-insulator photodetectors and suggests the alternative to suppress the dark current generation for Si-based Ge photodetectors.
Key concepts: Photodetector, Germanium, Dark current, Optoelectronics, Quantum tunnelling, Insulator (electricity), Current (fluid), Materials science