A 2 B 3 (A = BA,PEA; B = MA; n = 1,2):工程量子井晶体用于高质量密度和快速闪电器
Md Abdul Kuddus Sheikh1, Dominik Kowal1, Muhammad Haris Mahyuddin2
1Łukasiewicz Research Network-PORT Polish Center for Technology Development, Stabłowicka 147, Wrocław 54-066, Poland.
概括
量子井 (QW) 混合有机-无机矿 (HOIP) 化物晶体显示出由于其高质量密度和快速衰变时间,对快速辐射检测具有前途. 虽然光产量低于化物,但这些特性为先进的闪光灯开发提供了途径.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 核仪器仪表 核仪器仪表 核仪器仪表
背景情况:
- 量子井 (QW) 混合有机-无机矿 (HOIP) 晶体,如A2PbX4,显示出用于辐射检测的闪材料的潜力.
- 与3D矿 (例如,BPbX3) 相比,QW HOIP提供了增强的闪光性能.
- 新的A2BPb2X7结构来自3D和QW集成可能会产生改进的光学和闪光特性.
研究的目的:
- 研究基QW HOIP晶体 (A2PbI4和A2MAPb2I7) 的晶体结构,光学和闪光性能.
- 评估它们在辐射检测中具有高质量密度和快速定时应用的潜力.
- 为了比较基于的QW HOIP闪器与其化物对应器的性能.
主要方法:
- 合成和表征A2PbI4和A2MAPb2I7的矿晶体. 在这种过程中,矿晶体的合和表征.
- 测量光发光 (PL) 衰变时间和辐射光谱.
- 在X射线和γ射线激发下对闪光反应的评估,包括辐射吸收长度和衰变时间组件.
- 在低温 (10K) 和室温下确定光产量.
主要成果:
- A2PbI4晶体呈现出绿色和红色的辐射,具有超快的PL衰变时间 (<1 ns).
- 由于量子和介电封闭,A2MAPb2I7晶体具有高质量密度 (>3.0 g/cm3) 和可调节带隙 (<2.1 eV).
- 无论A2PbI4和PEA2MAPb2I7都在X射线和γ射线激发下显示出辐射.
- 以化物为基础的QW HOIP闪器显示的吸收长度较短 (在511 keV时约3 cm) 和衰变组件较快 (约0.5 ns) 比化物对应物.
- 在10K的光效率是~10光子/keV,而室温的光效率是1-2光子/keV (比化物低5倍).
结论:
- 基于的QW HOIP晶体在快速定时辐射检测方面表现出有前途的特性,包括高质量密度和快速闪光衰变.
- 在室温下较低的光效率是一个缺点,但并不能否定改善的潜力.
- 观察到的特征为开发基于QW HOIP材料的先进,快速定时的闪器提供了基础.
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