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Zhijun Ning, David Zhitomirsky, Valerio Adinolfi, Brandon Sutherland, Jixian Xu, Oleksandr Voznyy, Pouya Maraghechi, Xinzheng Lan, Sjoerd Hoogland, Yuan Ren and Edward H. Sargent Graded Doping for Enhanced Colloidal Quantum Dot Photovoltaics Advanced Materials 25

Article first published online: 5 FEB 2013 | DOI: 10.1002/adma.201204502

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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.

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