Improving Performance and Stability of Solution-Processed Organic Poly-gridofluorene Light-Emitting Diodes via Deuterated Solvents

IF 4.6 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-05-29 DOI:10.1021/acs.jpclett.5c0115710.1021/acs.jpclett.5c01157

Hao Li, Mengna Yu*, Jiangqiang He, Menghan Wu, Yang Li, Manman Luo, Kuande Wang, Yan Li, Yunfei Zhu, Qianyi Li, Qiuhu Han, Shasha Wang, Zhikuan Chen, Quanyou Feng* and Linghai Xie*,

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Abstract

Toluene and chloroform are widely utilized as solvents in optoelectronic device fabrication, but their carcinogenic properties and potential misuse in illicit drug synthesis subject them to strict state regulation. In contrast, their deuterated counterparts (toluene-d₈ and chloroform-d) are not recognized as carcinogens by the World Health Organization’s International Agency for Research on Cancer (IARC), presenting a safer alternative. Leveraging seawater-derived deuterium’s natural abundance, we implemented these deuterated solvents for spin-coating superhindered poly-gridofluorene (PODPFG) emissive layers in solution-processed OLEDs. Comparative studies revealed that films fabricated with deuterated solvents demonstrated a nearly 26% enhancement in PLQY and improved luminescence stability. Notably, the devices showed increased external quantum efficiency from 0.72% to 1.12% while preserving deep blue color purity. These improvements are attributed to the formation of larger and ordered aggregates through enhanced intermolecular interactions in deuterated media, which promote optimal interchain aggregation. Our approach establishes a novel paradigm for isotope engineering in green manufacturing of solution-processed OLEDs, simultaneously addressing toxicity concerns and performance optimization through solvent-mediated morphological control for nontoxic, green manufacturing practices and industrial applications.

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用氘化溶剂提高溶液法制备有机聚芴发光二极管的性能和稳定性

甲苯和氯仿是光电子器件制造中广泛使用的溶剂，但它们的致癌性和在非法药物合成中的潜在滥用使它们受到严格的国家监管。相比之下，它们的氘化产物（甲苯-d8和氯仿-d）不被世界卫生组织的国际癌症研究机构（IARC）认定为致癌物，提供了一种更安全的替代品。利用海水衍生的氘的天然丰度，我们将这些氘化溶剂用于溶液处理oled的自旋涂层超阻碍聚网格芴（PODPFG）发射层。对比研究表明，用氘化溶剂制备的薄膜的PLQY提高了近26%，并且提高了发光稳定性。值得注意的是，该器件在保持深蓝色纯度的同时，将外部量子效率从0.72%提高到1.12%。这些改进是由于在氘化介质中通过增强分子间相互作用形成更大、更有序的聚集体，从而促进了最佳的链间聚集。我们的方法为溶液处理oled绿色制造中的同位素工程建立了一个新的范例，同时通过溶剂介导的形态控制来解决毒性问题和性能优化，从而实现无毒、绿色制造实践和工业应用。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.