Copper(I)-Arsine Clusters with a Near-Unity Phosphorescence Quantum Yield for X-Ray Scintillation and LED Applicationsстатья
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
Аннотация: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.