Graded Doping for Enhanced Colloidal Quantum Dot Photovoltaics

• DOI: 10.1002/adma.201204502
• Publication Date: 2013-02-05T12:37:02Z
• Authors: Zhijun Ning; David Zhitomirsky; Valerio Adinolfi; Brandon Sutherland; Jixian Xu; Oleksandr Voznyy; Pouya Maraghechi; Xinzheng Lan; Sjoerd Hoogland; Yuan Ren; Edward H. Sargent
• Keywords: Homojunction; Multiple exciton generation

A novel approach to improving all-inorganic colloidal quantum dot (CQD) homojunction solar cells by engineering the doping spatial profile produce a gradient within n-type absorber is presented. The greatly improves carrier collection and enhances voltages attainable device, leading 1 power point conversion efficiency (PCE) improvement over previous inorganic CQD cells.