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Highly Stable All‐Inorganic Perovskite Quantum Dots Using a ZnX2‐Trioctylphosphine‐Oxide: Application for High‐Performance Full‐Color Light‐Emitting Diode
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-24 , DOI: 10.1002/adom.201901897 Seungmin Baek 1 , Seokwoo Kang 2 , Chaeyeon Son 1 , So Jeong Shin 1 , Jong H. Kim 1 , Jongwook Park 2 , Sang‐Wook Kim 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-02-24 , DOI: 10.1002/adom.201901897 Seungmin Baek 1 , Seokwoo Kang 2 , Chaeyeon Son 1 , So Jeong Shin 1 , Jong H. Kim 1 , Jongwook Park 2 , Sang‐Wook Kim 1
Affiliation
Perovskite is a very promising material that is being extensively studied at the bulk and nanosize scales because it has outstanding optical properties, including high quantum efficiency and narrow emission spectra. However, perovskite has stability issues related to heat, air, and light. To overcome these, highly stable perovskite quantum dots (PeQDs) are developed using excess Zn precursor and trioctylphosphine‐oxide (TOPO). In particular, it is clarified that Zn and TOPO are combined and these complexes are attached to the surface of the PeQDs through 31P NMR. They not only have high quantum efficiency and sharp full width at half maximum values (15–30 nm) but also have improved long‐term stability at high temperature. Additionally, XPS measurements are conducted for a detailed surface analysis of PeQDs, finding that the TOPO‐Zn complex effectively decrease PbO bonding in the lattice. Perovskite full‐color electroluminescence (EL) devices are fabricated using PeQDs and 9,9‐bis[4‐[(4‐ethenylphenyl)methoxy]phenyl]‐N2,N7‐di‐1‐naphthalenyl‐N2,N7‐diphenyl‐9H‐fluorene‐2,7‐diamine (VB‐FNPD) as a new cross‐linkable hole transporting material. The VB‐FNPD has a high‐hole carrier mobility compared to the PVK as conventional hole‐transporting layer. As a result of EL performance, they have high EQE (%) and current efficiency (Cd A−1) of (7.12%, 9.93 Cd A−1) for red, (6.06%, 32.5 Cd A−1) for green, and (0.56%, 0.88 Cd A−1) for blue‐emitting devices, respectively.
中文翻译:
使用ZnX2-Trioctylphosphine-Oxide的高度稳定的全无机钙钛矿量子点:高性能全色发光二极管的应用
钙钛矿是一种非常有前途的材料,由于其具有出色的光学性能,包括高量子效率和窄发射光谱,因此正在以体积和纳米尺寸进行广泛研究。然而,钙钛矿具有与热,空气和光有关的稳定性问题。为了克服这些问题,使用过量的锌前体和三辛基膦氧化物(TOPO)开发了高度稳定的钙钛矿量子点(PeQDs)。特别要说明的是,Zn和TOPO结合在一起,并且这些络合物通过31附着在PeQD的表面上。1 H NMR。它们不仅具有高量子效率和一半最大值(15–30 nm)处的锐利全宽,而且在高温下具有更高的长期稳定性。此外,XPS测量为PeQDs的详细表面分析进行的,发现该TOPO-Zn络合物有效地降低铅中的O晶格的结合。钙钛矿全色电致发光(EL)器件是使用PeQD和9,9-双[4-[(4-乙烯基苯基)甲氧基]苯基] -N2,N7-二-1-萘-N2,N7-二苯基-9H制成的芴-2,7-二胺(VB-FNPD)作为新型可交联的空穴传输材料。与作为常规空穴传输层的PVK相比,VB-FNPD具有较高的空穴载流子迁移率。由于具有EL性能,它们具有很高的EQE(%)和电流效率(Cd A -1)分别为红色的(7.12%,9.93 Cd A -1),绿色的(6.06%,32.5 Cd A -1)和蓝色发射器件的(0.56%,0.88 Cd A -1)。
更新日期:2020-04-21
中文翻译:
使用ZnX2-Trioctylphosphine-Oxide的高度稳定的全无机钙钛矿量子点:高性能全色发光二极管的应用
钙钛矿是一种非常有前途的材料,由于其具有出色的光学性能,包括高量子效率和窄发射光谱,因此正在以体积和纳米尺寸进行广泛研究。然而,钙钛矿具有与热,空气和光有关的稳定性问题。为了克服这些问题,使用过量的锌前体和三辛基膦氧化物(TOPO)开发了高度稳定的钙钛矿量子点(PeQDs)。特别要说明的是,Zn和TOPO结合在一起,并且这些络合物通过31附着在PeQD的表面上。1 H NMR。它们不仅具有高量子效率和一半最大值(15–30 nm)处的锐利全宽,而且在高温下具有更高的长期稳定性。此外,XPS测量为PeQDs的详细表面分析进行的,发现该TOPO-Zn络合物有效地降低铅中的O晶格的结合。钙钛矿全色电致发光(EL)器件是使用PeQD和9,9-双[4-[(4-乙烯基苯基)甲氧基]苯基] -N2,N7-二-1-萘-N2,N7-二苯基-9H制成的芴-2,7-二胺(VB-FNPD)作为新型可交联的空穴传输材料。与作为常规空穴传输层的PVK相比,VB-FNPD具有较高的空穴载流子迁移率。由于具有EL性能,它们具有很高的EQE(%)和电流效率(Cd A -1)分别为红色的(7.12%,9.93 Cd A -1),绿色的(6.06%,32.5 Cd A -1)和蓝色发射器件的(0.56%,0.88 Cd A -1)。