Journal of Central South University
·
2023
·Vol. 30
·期 8
·2501-2509
·
IF 4.4
Liu Wen-bo,Du Xue-rong,Wang Cheng-cheng,Zhuo Chun-xue,Chang Jin,Wang Na-na,Li Ren-zhi
Cesium copper halides have attracted increasing attention for light-emitting diodes (LEDs) applications due to their high photoluminescence quantum efficiency (PLQE) and non-toxicity. However, the current film fabrication methods for copper halides cannot simultaneously meet the high-performance, eco-friendly, and good environmental tolerance requirements. Here, we demonstrate a facile approach that combines the advantages of both traditional nanocrystal-based methods and precursor solution-based methods. Through treating Cs 3 Cu 2 I 5 nanocrystal films with proper alcohols, Cs 3 Cu 2 I 5 /CsCu 2 I 3 mixed-dimensional copper halides are formed with enhanced PLQE and improved energy level matching. This enhances the peak EQE of copper halide LEDs to 0.8%, which is among the highest efficiency of lead-free metal halide nanocrystal LEDs. This work provides a new strategy for fabricating high-performance lead-free LEDs in an eco-friendly manner.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 4
·2102315
·
IF 9.926
Ziqing Li,Chaolei Zuo,Xinya Liu,Zhuangzhuang Ma,Zhifeng Shi,Xiaosheng Fang
Lead-free ternary copper iodide perovskite analogues demonstrate great potential in photodetector, due to their nontoxity and excellent photophysical properties. However, the fast carrier recombination limits the photoelectric conversion efficiency. Herein, a room-temperature growth strategy with the selected raw ratio is adopted to enhance carrier dynamics. The optimized-grown CsCu 2 I 3 single crystal exhibits longer carrier lifetime of 157 ns, and its switch ratio and response time are enhanced by 20 000% and 600% compared with those of stoichiometric-grown single crystal, respectively. Furthermore, space-confined method is introduced to prepare ultralong single-crystalline CsCu 2 I 3 microbelt, with the aspect ratio up to 600. The sensitivity and self-powered performance of the UV photodetector are improved through constructing heterojunction with p-CuI and asymmetric electrodes. The enhanced performance is ascribed to superior type-II band alignment between CsCu 2 I 3 and CuI, which effectively promotes the separation of photogenerated carriers. This work not only provides an efficient way to boost the photoresponse in low-dimensional metal halide perovskite analogue, but also displays 1D anisotropic growth for potential application in large-area vapor-assisted patterned devices.
研究领域:
材料科学
·
光电探测器
·
半导体物理
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2024
·
IF 7.2
Sifan Chen,Tingting Zhao,Peiyuan Li,Shuanjin Wang,Dongmei Han,Sheng Huang,Wei Liu,Zhiheng Huang,Min Xiao,Yuezhong Meng
A completely new poly(carbonate-ester) macrodiol (PPCP-mDL), derived from direct copolymerization of carbon dioxide (CO 2 ), propylene oxide (PO), phthalic anhydride (PA) and 1, 4-butanediol (BDO) catalyzed by metal-free triethylborine (TEB)/1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) pairs has been developed. The molecular weight of PPCP-mDL produced varying from 1.1–2.3 kg mol −1 can be easily controlled through the regulation of reaction conditions. For the formulation of non-toxic, phthalate-free flexible PVC, novel and biodegradable ec-PPCP-mDL with high molecular weight may be obtained through end-capping the PPCP-mDL using benzoyl chloride. The ec-PPCP-mDL/PVC blends display better comprehensive plasticization performance than do comparable blends with commercial DEHP plasticizers. These blends exhibit high thermal stability, mechanical properies, plasticizer migration resistance and transmittance. The interaction between ec-PPCP-mDL and PVC has been characterized using FTIR spectroscopy. A possible mode of plasticization has been suggested. The rich ester groups in the structure of ec-PPCP-mDLs interact well with PVC via hydrogen bonding, resulting in excellent compatiblity with PVC. Overall, the novel ec-PPCP-mDL material, respects an attractive alternative to plasticizers as a green, non-toxic, biodegradable, partially sustainable for the preparation of flexible PVC formulations.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Haiming Cheng,Xudong Hu,Chi Cao,Xiaoming Li,Renguo Xie,Dayang Wang,Wensheng Yang,Ying Zhang
Scintillators, an important component of optoelectronic materials, have been used extensively for medical imaging and security detection. Currently, most X-ray imaging scintillators rely on inorganic scintillators that use rare earths. Scintillator materials with mild growth conditions, high light yield, environmental friendliness, and low cost are still worth exploring. Here, we prepared novel zero-dimensional (0D) organic-inorganic hybrid zinc halides [C 9 H 14 N] 2 ZnBr 4 (C 9 H 14 N + = N-butylpyridinium bromide cation) based on pyridine quaternary ammonium salt C 9 H 14 NBr and ZnBr 2 . Under UV excitation, the [C 9 H 14 N] 2 ZnBr 4 single crystal shows efficient blue light emission with the center at 426 nm, a large Stokes shift of 129 nm, and a high quantum yield of 49.95 %. In addition, the highly efficient blue emission of [C 9 H 14 N] 2 ZnBr 4 crystals was also able to be excited by X-rays. The [C 9 H 14 N] 2 ZnBr 4 crystal exhibited a relatively low detection limit of 4.995 μGy air s -1 . X-ray imaging results based on [C 9 H 14 N] 2 ZnBr 4 scintillation screens demonstrate high-performance X-ray imaging capabilities. According to these results, [C 9 H 14 N] 2 ZnBr 4 crystals are promising X-ray scintillators due to their non-toxicity, excellent luminescence, and good detection performance.
研究领域:
材料科学
·
光学
·
医学影像学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Feng Wang,Zhen-Feng Li,De-Bin Wan,Natalia Vasylieva,Yu-Dong Shen,Zhen-Lin Xu,Jin-Yi Yang,Jan Gettemans,Hong Wang,Bruce D. Hammock,Yuan-Ming Sun
The non-toxic immunoassay for mycotoxins is being paid more attention due to its advantages of higher safety and cost savings by using anti-idiotype antibodies to substitute toxins. In this study, with tenuazonic acid (TeA), a kind of highly toxic Alternaria mycotoxin as the target, an enhanced non-toxic immunoassay was developed based on the ferritin-displayed anti-idiotypic nanobody-nanoluciferase multimers. First, three specific β-type anti-idiotype nanobodies (AId-Nbs) bearing the internal image of TeA mycotoxin were selected from an immune phage display library. Then, the AId-Nb 2D with the best performance was exploited to generate a nanoluciferase (Nluc)-functionalized fusion monomer, by which a one-step non-toxic immunodetection format for TeA was established and proven to be effective. To further improve the affinity of the monomer, a ferritin display strategy was used to prepare 2D-Nluc fusion multimers. Finally, an enhanced bioluminescent enzyme immunoassay (BLEIA) was established in which the half maximal inhibitory concentration (IC50) for TeA was 6.5 ng/mL with a 10.5-fold improvement of the 2D-based enzyme-linked immunosorbent assay (ELISA). The proposed assay exhibited high selectivities and good recoveries of 80.0–95.2%. The generated AId-Nb and ferritin-displayed AId-Nb-Nluc multimers were successfully extended to the application of TeA in food samples. This study brings a new strategy for production of multivalent AId-Nbs and non-toxic immunoassays for trace toxic contaminants.
研究领域:
食品安全
·
生物化学
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）