Trends in Green Chemistry Open Access

Control doping of colloidal PbS quantum dot via UV treatment for high performance solar cells application

2^nd Edition of Global Summit on Renewable Energy & Emerging Technologies

October 05-06, 2018 Barcelona, Spain

Srikanth Reddy Tulsani and Arup Kumar Rath

CSIR - National Chemical Laboratory, India

Posters & Accepted Abstracts: Trends in Green chem

Abstract:

Colloidal quantum dot (PbS-CQD) optoelectronics offers a compelling combination of low cost, large area solution processing, and spectral tunability through the quantum size effects. Control doping of the CQD solids is of critical importance to achieve high depletion region and efficient extraction of photo generated carriers. In this work we used ultraviolet–ozone (UVO) treatment to the PbS-CQD layers for control p-doping. The brief UVO treatment leads to considerable performance improvement of the solar cell devices, whereas excessive UVO treatment found to reduce the device performance. The brief UVO treatment (<1 min) leads to mild oxidation of the CQDs film surface, this allowed to enhances the VOC and FF of the device. The increase in the photocurrent of the device after the ozone treatment leads to the higher power conversion efficiency compared with the without ultraviolet-ozone treatment.

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