Enhancement of Blue Spectral Response Intensity of PbS via Polyethylene Oxide-Adding for the Application to White LEDs

Samira Kaci; Aissa Keffous; Mohamed Trari; Brahim Mahmoudi; Hamid Menari

doi:10.4028/www.scientific.net/AMR.227.39

Paper Titles

Microstructure and Wear Behaviour of Al/TiB₂ Metal Matrix Composite
p.23

Numerical Simulation of Laser Bending of Thin Plate Stress Analysis and Prediction
p.27

Angular Distribution and Ion Time of Flight Produced on Silicon Target by Laser Irradiation
p.31

Investigation on Thin Films Deposited by PECVD from a DiPhenylMethylSilane (DPMS) Vapors or Mixed with Oxygen for Low-K Material Application
p.35

Enhancement of Blue Spectral Response Intensity of PbS via Polyethylene Oxide-Adding for the Application to White LEDs
p.39

Study of Optical and Structure Properties for Different Composition Tin-Antimony-Selenium Thin Film
p.43

Analyses of Plasmas Produced by Laser Ablation of Fresh Aliments
p.49

On the Electron Distribution Effect of an Expanding Laser Ablated Plasma
p.53

High Intensity Laser Ablation of Titanium Target
p.57

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Enhancement of Blue Spectral Response Intensity of PbS via Polyethylene Oxide-Adding for the Application to White LEDs

Abstract:

In this work, we have employed chemical bath deposition (CBD) method to obtain nanocrystalline PbS thin films in the presence of polyethylene oxide (PEO). The spectral response of Au/PbS-pSi(100)/Al Schottky photodiodes at different PEO amount were studied. The response exhibits a combined effect of photogeneration in the heterojunction (HJ) Si side and PbS. Spectral response were observed progressively at shorter wavelength due to the surface absorption. The peak centered at 410 nm properly corresponds to photo-exited holes being injected from PbS to the Si substrate. The intensity of the peak of R(λ) increases with PEO amount, this increasing was attributed to the decreasing of band gap (Eg).