王照奎教授课题组在adv. mater.上发表论文-尊龙凯时

题目：

screening fluorination additives for efficient perovskite light-emitting diodes

作者：

yu xia^1#, chen zou^2#, yan-hui lou³, yu-hang zhou¹, aleyna nar⁴, yu-han li¹, namatullah nizamani¹, kai-li wang¹, chun-hao chen¹, jing chen¹, nan li¹, ilhan yavuz⁴, liang-sheng liao¹, and zhao-kui wang¹*

单位：

¹institute of functional nano & soft materials (funsom), jiangsu key laboratory for carbon-based functional materials & devices, soochow university, suzhou 215123, china.

²state key laboratory of modern optical instrumentation, college of optical science and engineering, international research center for advanced photonics, zhejiang university, hangzhou 310058, china.

³college of energy, soochow institute for energy and materials innovations, soochow university, suzhou 215006, china.

⁴department of physics, marmara university, ziverbey, istanbul 34722, turkey.

摘要：

fluorinated additives are proposed to address the issue of domain polydispersity in quasi-2d perovskites. however, the lack of established screening criteria for these additives necessitates a laborious and costly trial-and-error process. herein, this work explores the behind nature for the first time how various fluorination in fluorinated additives affect domain distribution in quasi-2d perovskites. the studies reveal that fully fluorinated additives could suppress undesirable low-dimensional domains, facilitating efficient energy transfer, while partially fluorinated additives adversely cause deteriorated optical properties. the observed trend is ascribed to the molecular dipole moment of the fluorinated additives, offering a reasonable explanation for experimental phenomena that has never been reported before. by employing fully fluorinated additives, the fabricated sky-blue perovskite light-emitting diodes (peleds) deliver a peak external quantum efficiency (eqe) of 20.38% (@488 nm), marking as one of the highest efficiencies reported to date. the finding provides a screening criterion for fluorinated additives to realize efficient peleds.

影响因子：

27.4

分区情况：

一区

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