Wu Yanting, Xiao Zewu, He Lihong, Yang Xiaoli, Lian Yajun, Li Guoqing, Yang Xiaohui
School of Physical Science and Technology, Southwest University Chongqing 400715 China
RSC Adv. 2019 Sep 25;9(52):30398-30405. doi: 10.1039/c9ra05734j. eCollection 2019 Sep 23.
In this paper, a cross-linked poly(9-vinylcarbazole) (PVK):phosphomolybdic acid (PMA) layer is used as the hole transport layer in perovskite light-emitting devices, and the morphology, crystal structure, and photophysical properties of perovskite films on the PVK:PMA layer are studied. The addition of PMA into the PVK layer improves the perovskite morphology integrity and promotes hole transport. As a result, perovskite light-emitting devices using a PVK:PMA hole transport layer exhibit an improved maximum luminous efficiency of 22.1 cd A and power efficiency of 18.2 lm W when compared with those of the counterparts with a PVK hole transport layer. Efficient perovskite light-emitting devices can be accessed by using various antisolvents due to the good solvent resistance of PVK:PMA networks. Moreover, the luminous efficiencies of perovskite light-emitting devices with a PVK:PMA hole transport layer are almost invariant irrespective of the presence of a hole injection layer, illustrating wide applicability of the PVK:PMA hole transport layer in perovskite light-emitting devices.
在本文中，交联聚（9-乙烯基咔唑）（PVK）：磷钼酸（PMA）层被用作钙钛矿发光器件中的空穴传输层，并研究了PVK：PMA层上钙钛矿薄膜的形态、晶体结构和光物理性质。向PVK层中添加PMA可改善钙钛矿形态的完整性并促进空穴传输。结果，与具有PVK空穴传输层的同类器件相比，使用PVK：PMA空穴传输层的钙钛矿发光器件表现出更高的最大发光效率，为22.1 cd/A，功率效率为18.2 lm/W。由于PVK：PMA网络具有良好的耐溶剂性，使用各种反溶剂可制备出高效的钙钛矿发光器件。此外，具有PVK：PMA空穴传输层的钙钛矿发光器件的发光效率几乎不受空穴注入层存在与否的影响，这表明PVK：PMA空穴传输层在钙钛矿发光器件中具有广泛的适用性。
