Highly stable hybrid perovskite light-emitting diodes based on Dion-Jacobson structure.

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ID: 19608
2019
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Abstract
Organic-inorganic hybrid halide perovskites are emerging as promising materials for next-generation light-emitting diodes (LEDs). However, the poor stability of these materials has been the main obstacle challenging their application. Here, we performed first-principles calculations, revealing that the molecule dissociation energy of Dion-Jacobson (DJ) structure using 1,4-bis(aminomethyl)benzene molecules as bridging ligands is two times higher than the typical Ruddlesden-Popper (RP) structure based on phenylethylammonium ligands. Accordingly, LEDs based on the DJ structure show a half-lifetime over 100 hours, which is almost two orders of magnitude longer compared with those based on RP structural quasi-two-dimensional perovskite. To the best of our knowledge, this is the longest lifetime reported for all organic-inorganic hybrid perovskites operating at the current density, giving the highest external quantum efficiency (EQE) value. In situ tracking of the film composition in operation indicates that the DJ structure was maintained well after continuous operation under an electric field.
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shang2019highlyscience Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Shang, Yuequn;Liao, Yuan;Wei, Qi;Wang, Ziyu;Xiang, Bo;Ke, Youqi;Liu, Weimin;Ning, Zhijun;
Journal Science advances
Year 2019
DOI
10.1126/sciadv.aaw8072
URL
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