Advanced Optical Materials
·
2026
·
IF 7.2
Chengyang Liang,Lin Zhang,Delin Kong,Mengqi Zhang,Zhitao Xue,Jianjun Tian
The elimination of redundant surface organic ligands on perovskite quantum dots (PQDs) is a critical procedure for the construction of high-efficiency light-emitting diodes (LEDs). Nevertheless, such ligand removal readily induces undesirable phase transition owing to the intrinsically unstable surface configuration of PQDs, which severely hinders the large-scale manufacturing of high-performance LEDs. Herein, we develop tetrabutylammonium hexafluorophosphate (TBAPF 6 ) surface reconstruction of CsPbI 3 PQDs during di-isooctylphosphinic acid (DSPA) assisted synthesis and purification. The short chain DSPA has strong coordination with PQDs, while TBA + ions are compensated for Cs + surface vacancies, and PF 6 − ions combine onto Pb 2+ sites to stabilize the structure through filling I − vacancies. This strategy substantially suppressed phase transformation during synthesis and purification, thereby enhancing the moisture and oxygen stability of the PQDs to extend the processing window of device fabrication. LEDs fabricated using freshly stored PQD within 7 days showed negligible efficiency degradation, yielding a peak external quantum efficiency (EQE) over 25%. Notably, even after long-term storage for 30 days, the assembled LEDs still achieved a high EQE of more than 22%. Accordingly, this strategy provides a viable pathway for the scalable preparation of wide-processing-window LEDs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Qing Tian,Guozhen Ding,Yuting Cai,Zicheng Li,Xueyuan Tang,Rong-Jun Xie,Peng Gao
To pursue practical applications of perovskite solar cells (PSCs), while the power conversion efficiencies (PCEs) are continuously pushed up, defect passivation of the metal halide perovskite layer is considered an efficacious method for improving the efficiency and stability of the devices. Herein, we proposed incorporating iodine-rich CsPbI3 quantum dots (QDs) in the halide perovskite film to improve the photovoltaic performance of PSCs. Using the modified QDs enabled the reduction of the nonradiative recombination centers by passivating iodide vacancies and optimization of the energy alignment near to the perovskite/hole transport material interface. Finally, high-performance planar PSCs with an efficiency exceeding 22% and higher long-term stability (over 91% of its initial PCE after 39 days) were achieved.
研究领域:
材料科学
·
能源技术
·
光电转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Ou Hai,Jian Li,Mengkang Pei,Qiang Ren,Xiulan Wu,Bin Qin,Xinnan Xiao,Xiaoli He,Tong Li,Yang Chen
Advanced fluorescence anti-counterfeiting technology has attracted the attention of researchers and encourages people to develop more materials with more colors and functions. Here, in order to achieve a full-band afterglow in the visible light region, we designed a composite CsPbI3-CsPbBr3/Sr2MgSi2O7:Eu2+,Dy3+@SiO2, which is composed of nanoscale all-inorganic cesium lead perovskite quantum dots (PQDs) and long-afterglow luminescent materials Sr2MgSi2O7:Eu2+,Dy3+ (SMS). SMS is used to store light energy, and PQDs are used to control afterglow emission colors; through their energy transfer, the afterglow colors can be adjusted in the visible region. SiO2 is used as the coating material to improve the temporary stability of the nanocomposite. The composite mixed with oleic acid (OA) can be used as a dye, which exhibits different emitting colors and afterglow colors under different excitation environments. This research provided an idea for using long-afterglow luminescent materials and PQDs in the field of fluorescence anti-counterfeiting by double anti-counterfeiting of fluorescence and afterglow.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 29
·14108-14115
·
IF 5.8
Jiaying Zheng,Jiwei Ma,Minghuai Yu,Hao Xie,Dongdong Yan,Yihong Dong,Yi Liu,Xiaoyu Wang,Weixiang Ye
Inorganic CsPbI3 perovskite nanocrystals (NCs) exhibit remarkable optoelectronic properties for illumination. However, their poor stability has hindered the development of light-emitting diodes (LEDs) based on these materials. In this study, we propose a facile method to synthesize Mg2+-doped CsPbI3 NCs with enhanced stability and high photoluminescence (PL) intensity under ambient air conditions. Theoretical calculations confirm that doped NCs possess stronger formation energy compared to undoped NCs. The undoped CsPbI3 NCs emit red light at approximately 653 nm. We optimize the doping ratio to 1/30, which significantly enhances the photoluminescence of single-particle CsPbI3 NCs. Subsequently, we fabricate a red LED by combining the CsPbI3 NCs with a blue chip. The resulting LED, based on the doped CsPbI3 NCs, exhibits excellent performance with a high luminance of 4902.22 cd m−2 and stable color coordinates of (0.7, 0.27). This work not only presents a simple process for synthesizing perovskite NCs but also provides a design strategy for developing novel red LEDs for various applications.
研究领域:
材料科学
·
光电技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Yaqian Zhang,Jianming Liu,Huiling Zhang,Qingyun He,Xiaojuan Liang,Weidong Xiang
In this work, a series of perovskite nanocrystals glasses with different concentrations of Tb 3+ doped CsPbI 3 , which have excellent characteristics in terms of water resistance and cyclic thermal stability, were prepared by melt quenching and in situ crystallization methods. With the introduction of Tb 3+ , the photoluminescence quantum yield of CsPbI 3 was greatly improved. Considering that the two fluorescence peaks of Tb 3+ and CsPbI 3 at different positions respond differently to temperature stimuli, we studied the potential application of those glasses as optical temperature detection tools in the temperature range of 80−480 K. More importantly, the results showed higher sensitivity than other tools, with the maximum absolute and relative temperature sensitivities reaching as high as 0.034 K −1 and 1.78 % K -1 , respectively. This work is expected to provide an effective method for the application of CsPbX 3 in high-performance optical temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Muhammad Sohail,Zulfiqar Ali,M. Sohail,Areej S. Alqarni,Intikhab Alam,Nimra Razzaq,Fazl ullah,Qiuyun Ouyang
Halide perovskites, particularly cesium lead iodide (CsPbI3), have garnered significant attention due to their remarkable properties, including strong absorbance across the visible to near-infrared spectrum and a unique electronic structure that enhances their nonlinear optical (NLO) and optoelectronic applications. In this study, CsPbI3 was synthesized using a hot injection technique and incorporated into a methyl methacrylate (MMA) matrix through polymerization to form CsPbI3/PMMA organic glasses. The NLO properties of these glasses were characterized using the Z-scan technique with a nanosecond pulse laser at an excitation wavelength of 532 nm. Notably, the CsPbI3/PMMA organic glasses exhibited a transition from saturable absorption (SA) to reverse saturable absorption (RSA) upon adjusting the input energy. Furthermore, by integrating a fiber ferrule coating-based CsPbI3 saturable absorber (SA) into the laser cavity, we successfully realized a passively Q-switching (PQS) laser with a minimum pulse duration of 4.7 μs and a signal-to-noise ratio (SNR) of 50 dB at 1.55 μm, respectively. Consequently, the experimental findings indicate that CsPbI3NP-based saturable absorbers (SAs) exhibit performance characteristics that are either comparable to or surpass those of conventional nanoparticle-based SAs. This observation underscores the significant potential of CsPbI3-based SAs for applications in pulsed laser sources, suggesting their viability as advanced materials for enhancing laser performance and stability.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Song Wang,Hongyan Li,Yusheng He,Jiaxin Rui,Zhaogang Teng,Lihong Qi,Kai Pan
All-inorganic lead halide perovskites (CsPbX3) have attracted extensive attention due to their outstanding optoelectronic properties; however, their practical applications are severely limited by structural instability and defect-induced nonradiative recombination. Herein, we report a kinetically controllable hot-injection strategy to synthesize Cu2+-doped CsPbI3 nanoplates (NPLs). By precisely regulating the injection timing and amount of hydroiodic acid, a critical balance nucleation and growth is established, enabling the formation of uniform NPLs. Structural analysis confirms successful incorporation of Cu2+ into the CsPbI3 lattice without phase transition, accompanied by slight lattice contraction. Importantly, Cu2+ doping does not significantly change the bandgap but effectively reduces defect density, as evidenced by decreased Urbach energy and prolonged carrier lifetime. As a result, the photoluminescence quantum yield is maximized at an optimal doping level of 10%, reflecting effective defect suppression. Time-resolved photoluminescence further reveals suppressed nonradiative recombination and improved carrier dynamics. Moreover, the doped NPLs exhibit significantly enhanced stability, retaining ∼82% of their initial PL intensity after 20 days, compared to ∼8% for pristine samples. Overall, this work provides an effective strategy for simultaneously improving the luminescence performance and environmental stability of perovskite nanomaterials through defect engineering.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Miao Yan,Jian Ni,Shanjing Liu,Yuchen Miao,Yuhang Wang,Haoxuan Li,Xinyu Song,Guijun Li,Tiantian Li,Yingtang Zhou,Ying Zhang,Juan Li,Hongkun Cai,Jianjun Zhang
All-inorganic CsPbI3 perovskite quantum dots (PQDs) have attracted increasing attention for next-generation photovoltaics owing to their outstanding optoelectronic properties. However, surface defect states─primarily induced by dynamic ligand detachment─severely deteriorate device performance. Herein, a thiophene-assisted solution-phase ligand exchange strategy is developed to fabricate all-inorganic CsPbI3 PQD films with significantly reduced structural defects. The incorporation of 2-Thiophenacetamide (TPT) strengthens interdot electronic coupling, leading to PQD films with improved energetic homogeneity. Density functional theory calculations reveal that TPT exhibits stronger binding energy on PQD surfaces, favoring robust defect compensation and enhanced film stability. Compared with conventionally processed PQD solar cells, the TPT-treated devices demonstrate an increase in power conversion efficiency from 13.7% to 15.1%. This study provides mechanistic insights into the role of thiophene-based ligands in modulating PQD surface chemistry and establishes an effective molecular engineering strategy for achieving high-performance PQD photovoltaics.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Huiqing Wang,Yuhao Geng,Yadi Zhao,Jinyu Zheng,Zhuo Chen,Jianhong Xu
The application of CsPbI 3 nanocrystals (NCs) with excellent optical properties remains challenging due to their intrinsic environmental instability and low productivity by traditional batch methods. Here, we introduce a droplet-flow microreactor system for the efficient and controlled synthesis of CsPbI 3 NCs modified with poly (maleic anhydride-alt-1-octadecene) (PMA). Optimized within this system, the required PMA addition is reduced by 50 % compared to batch synthesis, while the resulting NCs exhibit a narrower emission peak, a higher photoluminescence quantum yield (PLQY) of 89 %, and an extended fluorescence lifetime. The strong Pb–O bond formed between PMA and the NC surface effectively passivates defects and enhances the environmental stability of CsPbI 3 NCs, with more than 75 % PLQY retained even after 40 days in water. Moreover, the system enables gram-scale production of high-performance CsPbI 3 nanocrystals in only 20 min. Red LED devices fabricated using these CsPbI 3 NCs as a color-conversion layer exceed the latest Rec. 2020 display standards on the CIE chromaticity coordinates.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Dai Weideren,Li Jinhua,Gou Yanzhuo,Zhang Jiaqi,Pan Zexun,Li Xianglong,Hu Haojun,Wang Shulin,Mei Tao,Wang Xianbao,Chen Chao,Tai Qidong,You Jingbi
The intrinsic phase instability of CsPbI 3 perovskites necessitates stringent fabrication conditions, significantly hindering the practical deployment. In the DMA-mediated CsPbI 3 nucleation system, the Cs + /DMA + ion exchange critically governs the resulting film quality. Here, we employ a moisture-responsive crystallization strategy utilizing propyltriethoxysilane (PTES) to deposite CsPbI 3 under ambient air with high humidity (55%). We demonstrate that the siloxane groups can capture DMA + in the intermediate DMAPbI 3 , facilitating DMA + extraction and Cs + incorporation, thereby accelerating crystallization kinetics. This approach enables CsPbI 3 PSCs to achieve a power conversion efficiency (PCE) of 21.00% with an impressive fill factor (FF) of 86.1% while processing perovskite under relative humidity (RH) of 55%. Higher PCEs of 21.85% and 22.60% (certified 22.02%) were achieved for devices fabricated at a lower RH of 25% and for films spin-coated under an N 2 atmosphere followed by annealing in ambient air, respectively. Furthermore, PTES-treated devices exhibit excellent operational stability under ambient conditions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-10
·
IF 31.6
Li Yanming,Deng Ming,Zhang Xuanyu,Qian Lei,Xiang Chaoyu
CsPbI 3 perovskite quantum dots (QDs) are ideal materials for the next generation of red light-emitting diodes. However, the low phase stability of CsPbI 3 QDs and long-chain insulating capping ligands hinder the improvement of device performance. Traditional in-situ ligand replacement and ligand exchange after synthesis were often difficult to control. Here, we proposed a new ligand exchange strategy using a proton-prompted in-situ exchange of short 5-aminopentanoic acid ligands with long-chain oleic acid and oleylamine ligands to obtain stable small-size CsPbI 3 QDs. This exchange strategy maintained the size and morphology of CsPbI 3 QDs and improved the optical properties and the conductivity of CsPbI 3 QDs films. As a result, high-efficiency red QD-based light-emitting diodes with an emission wavelength of 645 nm demonstrated a record maximum external quantum efficiency of 24.45% and an operational half-life of 10.79 h.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Kun He,Yanqing Zhu,Zhuoneng Bi,Xiaoli Chen,Xiudi Xiao,Gang Xu,Xueqing Xu
In this paper, the highly emissive CsPbI 3 perovskite quantum dots (QDs) with good stability are successfully synthesized with trioctylphosphine (TOP) as surface ligands. Furthermore, a facile and fast anion exchange is realized at the interface of nonpolar CsPbX 3 solution and aqueous hydrohalic acid. Perovskite QDs can react with halide ions at room temperature swiftly to adjust their ratio of halogens and then the emission. The photoluminescence (PL) can be tuned over wide spectral region (423.0–670.5 nm). And this work also provides a fast avenue to tune the emission of halide perovskite QDs.
研究领域:
纳米材料
·
光电子学
·
钙钛矿量子点
·
发光材料
·
阴离子交换化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）