Photovoltaic & Optoelectronic Device Group: publications

Endohedral Metallofullerenes: New Structures and Unseen Phenomena

Chemistry - A European Journal Wiley 26:26 (2020) 5748-5757

Authors:

Wangqiang Shen, Shuaifeng Hu, Xing Lu

Frontispiece: Endohedral Metallofullerenes: New Structures and Unseen Phenomena

Chemistry - A European Journal Wiley 26:26 (2020)

Authors:

Wangqiang Shen, Shuaifeng Hu, Xing Lu

Maximizing the external radiative efficiency of hybrid perovskite solar cells

Pure and Applied Chemistry De Gruyter 92:5 (2020) 697-706

Authors:

Dane W deQuilettes, Madeleine Laitz, Roberto Brenes, Benjia Dou, Brandon T Motes, Samuel D Stranks, Henry J Snaith, Vladimir Bulović, David S Ginger

Light-Driven Electrochemical Carbon Dioxide Reduction to Carbon Monoxide and Methane Using Perovskite Photovoltaics

Cell Reports Physical Science Elsevier 1:5 (2020) 100058

Authors:

Serkan Esiner, Junke Wang, René AJ Janssen

Low Roll‐Off Perovskite Quantum Dot Light‐Emitting Diodes Achieved by Augmenting Hole Mobility

Advanced Functional Materials Wiley 30:19 (2020) 1910140

Authors:

Yu Wang, Yu Teng, Po Lu, Xinyu Shen, Pei Jia, Min Lu, Zhifeng Shi, Bin Dong, William W Yu, Yu Zhang

Abstract:

AbstractThe external quantum efficiencies (EQEs) of perovskite quantum dot light‐emitting diodes (QD‐LEDs) are close to the out‐coupling efficiency limitation. However, these high‐performance QD‐LEDs still suffer from a serious issue of efficiency roll‐off at high current density. More injected carriers produce photons less efficiently, strongly suggesting the variation of ratio between radiative and non‐radiative recombination. An approach is proposed to balance the carrier distribution and achieve high EQE at high current density. The average interdot distance between QDs is reduced and this facilitates carrier transport in QD films and thus electrons and holes have a balanced distribution in QD layers. Such encouraging results augment the proportion of radiative recombination, make devices with peak EQE of 12.7%, and present a great device performance at high current density with an EQE roll‐off of 11% at 500 mA cm−2 (the lowest roll‐off known so far) where the EQE is still over 11%.

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