Advanced interfacial engineering with Poly-TPD for CsPbBr3-based perovskite light emitting diodes

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-09 DOI:10.1016/j.jlumin.2025.121241

Lalita , Ashish Kumar , Harshit Sharma , Vidya Nand Singh , Ritu Srivastava

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引用次数: 0

Abstract

Perovskite based light-emitting diodes are showing significant potential for next-generation displays and lighting applications as a result of easy solvent-based manufacture, high photoluminescence quantum efficiency, and tunable electronic bandgaps. Despite these advantages, morphological defects, unbalanced charge transport, and stability challenges hinder its broad applications in light-emitting devices. Herein, we introduce a simple and affordable approach to address these challenges; we fabricated the device having structure ITO/PEDOT:PSS/poly-TPD/CsPbBr₃-Poly-TPD/BCP/TPBi/LiF/Al by spin coating and thermal deposition technique. To improve the morphology of the CsPbBr₃ active layer, encapsulate QDs using poly-TPD for fabrication of LEDs. The interfacial chemistry of nanocrystals was tuned to obtain moderately enhanced luminescence and efficient charge transport in the perovskite layer by adjusting the concentration of the hole transport layer beneath the active layer, which is CsPbBr₃ QDs mixed with the poly-TPD matrix. Full-width half maxima within 20 ± 0.5 nm after mixing with poly-TPD in the emissive layer, indicating a high degree of color purity; this type of material is well-suited for an expanded color gamut in display applications. We demonstrated a device with better surface morphology, shown by atomic force microscopy with the optimized hole transport layer concentration. The study could open the door for perovskite polymer union for better optoelectronic devices such as large-scale production of LEDs, flexible display, and stability in the air.

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利用 Poly-TPD 对基于 CsPbBr3 的过氧化物发光二极管进行先进的界面工程设计

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.