title   
  

Solution based Al/PbS and Ti-Au/PbS Schottky photodiodes for SWIR detection

Heves, Emre and Gürbüz, Yaşar (2012) Solution based Al/PbS and Ti-Au/PbS Schottky photodiodes for SWIR detection. In: Conference on Electro-Optical and Infrared Systems - Technology and Applications IX, Edinburgh, Scotland

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1117/12.979806

Abstract

In this work, PbS colloidal quantum dot based photodiodes are realized that is compatible for integration to read out electronics. Schottky photodiode topology is selected to implement PbS quantum dots as photodetector because of its fast response and moderate sensitivity. The device is formed from Indium tin oxide (ITO) anode, the photosensitive PbS layer and a schottky contact formed of both aluminum or titanium and gold stack. Ligand exchange processes optimized in order to replace long capping ligands of PbS QDs with shorter ones. Layer by layer deposition method is applied to form pinhole free PbS CQD films. For Al/PbS samples rectification ratios greater than 100 is achieved for +/- 2 V bias voltages. At 2V reverse bias and under 5mW/cm(2) illumination, 0.195 A/W responsivity and 8.19 x 10(10) Jones normalized detectivity is achieved. For Ti-Au/PbS samples, rectification ratio greater than 250 is achieved for +/- 2 V bias voltages. At 3V reverse bias, 0.667 A/W responsivity, 53.3 % quantum efficiency and 2,12 x 10(10) Jones normalized detectivity is achieved.

Item Type:Papers in Conference Proceedings
Additional Information:Article Number: 85411M
Uncontrolled Keywords:Colloidal Quantum Dots; PbS quantum dots; SWIR detection; solution based photodetector
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
ID Code:24207
Deposited By:Yaşar Gürbüz
Deposited On:09 May 2014 14:41
Last Modified:09 May 2014 14:41

Repository Staff Only: item control page