In this letter we report a direct correlation between the space charge limited current flow and radiation detection properties of Cd_xZn_1-xTe_1-ySe_y (CZTS) detector. CZTS is a recently discovered quaternary wide bandgap semiconductor for room-temperature gamma photon detection. The CZTS single crystals have been grown in-house using a modified Bridgman technique. Planar detectors were fabricated and characterized in terms of charge carrier flow and radiation detection measurements. An anomalous current flow falling outside the Lampert’s triangle in $\textit {logJ}-\textit {logV}$ plot, has been observed which is not generally seen in semiconductor detectors governed by space-charge limited current flow mechanism. The anomalous behavior has been attributed to the presence of electron traps. The devices were tested for their radiation detection properties by acquiring pulse height spectra using ²⁴¹Am and a ¹³⁷Cs isotopes as a source of alpha particles and gamma photons, respectively. It was further noticed that the only detectors which worked satisfactorily as radiation detectors, did not exhibit the anomalous current flow mechanism.

中文翻译：

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CdxZn1-xTe1-ySey室温辐射探测器空间电荷限制电流与γ射线响应的相关性

在这封信中，我们报告了空间电荷限制电流与 Cd 的辐射检测特性之间的直接相关性_X锌_1-XTe _1-是硒_是(CZTS) 探测器。CZTS 是最近发现的用于室温伽马光子检测的四元宽带隙半导体。CZTS 单晶是使用改良的 Bridgman 技术在内部生长的。平面探测器是根据电荷载流子流和辐射探测测量值制造和表征的。异常电流落在兰伯特三角形之外 $\textit {logJ}-\textit {logV}$ 图，已经观察到，这在由空间电荷限制电流流动机制控制的半导体探测器中通常是看不到的。这种异常行为归因于电子陷阱的存在。通过分别使用²⁴¹ Am 和¹³⁷ Cs 同位素作为 α 粒子和 γ 光子源获取脉冲高度光谱，测试了这些设备的辐射检测特性。进一步注意到，唯一能够令人满意地作为辐射探测器工作的探测器没有表现出异常电流流动机制。