All‐inorganic Cu‐based perovskite CsxCuyIx+y thin films are deposited with vacuum thermal evaporation using CuI and CsI mixed powder with different proportion as evaporation sources. With CuI film as buffer‐layer, the as grown CsxCuyIx+y perovskite films only have CsCu2I3 phase owing to the epitaxy on CuI layer. And the thin film quality and optoelectronic properties of CsCu2I3 are also improved. Then, metal–semiconductor–metal UV detectors based on CsCu2I3 films with Au interdigital electrodes are fabricated and the enhancement of photoresponse performance is investigated in detail. The peak responsivity and specific detectivity of the detector are 49.22 mA W−1 and 2.49 × 1012 cm Hz1/2 W−1, which are 74 and 138 times larger than that of the device without the CuI buffer‐layer, respectively.

Cu-based halide perovskite derivatives (PDs) have emerged in recent years due to their low toxicity, high stability, and earth-abundant source. In particular, due to the special photophysical properties, such as broadband visible photoluminescence (PL), large Stokes shift, and high luminous efficiency, Cs−Cu−I PDs have attracted more attention in white light and short-wavelength light-emitting device applications. Here, Cs−Cu− I nanoscale-thick films with a mixed phase of CsCu 2 I 3 and Cs 3 Cu 2 I 5 are prepared by thermal evaporation. By adjusting the proportion of the evaporation source, different phase structures and tunable PL characteristics are realized. Subsequently, with a UV light-emitting diode (310 nm) as the excitation source, standard white emission with Commission International de l'Eclairage coordinates of (0.333, 0.338) is observed when the molar ratio of CsI and CuI powders is 0.75:1. Cs−Cu−I nanoscalethick films with excellent air stability might have promising potential applications in white lighting sources.

All-inorganic lead-free perovskite C s 3 C u 2 I 5 thin films were prepared using pulsed laser deposition. Effects of the substrate temperature, laser energy, and laser frequency on the film structure and optoelectronic properties were studied. A heterojunction photodetector based on C s 3 C u 2 I 5 / n − S i was constructed, and the deep-ultraviolet photoresponse was obtained. A high I l i g h t / I d a r k ratio of 130 was achieved at − 1.3 V , and the peak response of the heterojunction photodetector was 70.8 mA/W (280 nm), with the corresponding specific detectivity of 9.44 × 10 11 c m ⋅ H z 1 / 2 ⋅ W − 1 . Moreover, the device showed good stability after being exposed to air for 30 days.

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YVO4:Eu3+@CDs core–shell nanomaterial was synthesized through a simple self-assembly of carbon dots (CDs) with YVO4:Eu3+, since the high affinity of oxygen-containing groups such as –COOH or –OH of CDs to the metal ions on the surface of YVO4:Eu3+.

Introduction With the progression of blood analysis technology, hematology analyzers become more complex and diverse. How to choose a superb instrument is a challenge for the laboratories. In the essay, we studied whether the newest BC‐6000 hematology analyzer meets the needs of a clinical hematology laboratory. Methods Methods comparison was performed using 350 blood samples from patients between different measurement procedures; the basic analytical performance was also tested, including the throughput, carryover, precision, and linearity in different modes. The flagging performances for blasts, immature granulocytes, and NRBC were compared with manual microscopy. Results There were minimal carryover (<0.30%) and excellent actual blood linearity for all routinely used parameters concerned by the clinicians (R2 ≥ 0.997). Repeatability and reproducibility were satisfactory at all testing levels. The functional sensitivity of leukocytes and platelets in the blood and leukocytes and erythrocytes in body fluid was excellent at the 20% CV level. BC‐6000 and XN displayed very high correlations for complete blood count (CBC) parameters and very high consistency for leukocyte differentials and NRBC compared with manual microscopy. BC‐6000 showed excellent sensitivity and specificity flagging ability on blasts (82.9% and 82.4%) and NRBC (80.0% and 96.9%). For immature granulocytes, BC‐6000 showed excellent sensitivity but common specificity flagging ability (91.7% and 65.6%). Conclusion The clinical performance of BC‐6000 is excellent, and the analyzer can provide timely and accurate reporting for most of the small‐ to large‐scale laboratories.

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