Characterization of High-Flux CdZnTe with optimized electrodes for 4th generation synchrotrons

In this collaboration work between IMEM-CNR and the ESRF, we explore the potential of the Redlen Technologies High-Flux Cadmium Zinc Telluride (HF-CZT) material for direct X-ray detection at fluxes ranging from10(+7) to 10(+12) photons mm(-2) s(-1). HF-CZT single crystals with optimized electroless gold and sputtered platinum electrodes are characterized both under dark conditions and under X-ray irradiation. We report low leakage current under dark conditions (<100 pA/mm(2) at 5 kV/cm). We also report good linearity (R-2 > 0.999) under moderate to high incident X-ray flux (10(+7) to 10(+10) photons mm(-2) s(-1)) as well as good stability and reproducibility for incident X-ray fluxes up to 10(+12) photons mm(-2) s(-1). Finally, we study transient phenomena in the seconds time range and report fast stabilization time (< 200 ms) and negligible afterglow in this time range.

Automated summary

In this collaborative study, the potential of Redlen Technologies' HF-CZT material for direct X-ray detection at different fluxes was explored. The HF-CZT single crystals with optimized electrodes showed low leakage current under dark conditions and good linearity under different incident X-ray fluxes. The material also exhibited good stability and reproducibility at high incident X-ray fluxes. Fast stabilization time and negligible afterglow were observed in the seconds time range.