Graded doping for enhanced colloidal quantum dot photovoltaics.

Authors :: Ning Z
Zhitomirsky D
Adinolfi V
Sutherland B
Xu J
Voznyy O
Maraghechi P
Lan X
Hoogland S
Ren Y
Sargent EH
Source :: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2013 Mar 25; Vol. 25 (12), pp. 1719-23. Date of Electronic Publication: 2013 Feb 05.
Publication Year :: 2013
Abstract: A novel approach to improving all-inorganic colloidal quantum dot (CQD) homojunction solar cells by engineering the doping spatial profile to produce a doping gradient within the n-type absorber is presented. The doping gradient greatly improves carrier collection and enhances the voltages attainable by the device, leading to a 1 power point power conversion efficiency (PCE) improvement over previous inorganic CQD solar cells.<br /> (Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)