Copper(I)‐Arsine Clusters with a Near‐Unity Phosphorescence Quantum Yield for X‐Ray Scintillation and LED Applications

• Published in: Advanced optical materials Vol. 12; no. 14
• Main Authors: Demyanov, Yan V., Ma, Zihao, Jia, Zhenglin, Rakhmanova, Marianna I., Carignan, Gia M., Bagryanskaya, Irina Yu, Sulyaeva, Veronika S., Globa, Anastasiya A., Brel, Valery K., Meng, Lingqiang, Meng, Hong, Lin, Qianqian, Li, Jing, Artemev, Alexander V.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01-05-2024
• Subjects: arsine ligands; cluster compounds; Clusters; Cubane; Light emitting diodes; Phosphorescence; Phosphors; photophysics; Quantum efficiency; Room temperature; Scintillation; scintillators
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202302904

Rare‐earth element‐free materials that exhibit strong room temperature phosphorescence (RTP) and X‐ray scintillation properties are gaining global interest incessantly in the recent years. This work reports a series of easily synthesizable cubane Cu4I4‐triarsenic clusters [Cu4I4(R3As)3L] (L = none or nitrile), that exhibit a strong yellow‐green RTP with quantum efficiencies up to 100% and short decay times (4.4–4.9 µs). The title cluster complexes display X‐ray scintillation properties with a record ultralow detection limit (18.1 nGy s−1) and a perfectly linear dose rate response within a remarkably wide dose rate window (0–640 µGyair s−1). The cluster [Cu4I4(Ph3As)3] is highlighted as an efficient phosphor for UV‐pumped white and yellow LED devices, demonstrating an excellent white spectrum with a CIE index of (0.32,0.33) and bright yellow emission, respectively. These results may stimulate the future efforts in designing highly efficient arsenic‐based RTP materials and enriching the Cu4I4 cluster family.
Herein an unprecedented triarsenic clusters [Cu4I4(R3As)3L] (L = none or nitrile) are reported to exhibit a yellow‐green phosphorescence with the quantum efficiency of up to 100% as well as remarkable X‐ray scintillation properties with a low‐record limit of low detection just 18.1 nGyair s−1. Cluster [Cu4I4(Ph3As)3] is also demonstrated as an efficient phosphor for LED devices, which exhibit an excellent bright white and yellow emission.