Flexible and Printed Electronics
·
2021
·Vol. 6
·期 1
·015008
·
IF 3.588
Li Xiang,Ya Wang,Xiyuan Liu,Xuekai Huang,Zhilong Xin,Yangbing Xu,Chuan Liu,Kai Wang,Jun Chen,Yang Yang,Shengdong Zhang,Hang Zhou
X-ray photodetection are frequently used in medical diagnoses industrial inspection and environmental radiation detection. Currently, there is an ongoing effort to develop bendable or flexible x-ray photodetectors (PDs) to meet the demand on light weight and arbitrary shape detection system. Here, a highly bendable indirect x-ray PD is designed by coupling a P3HT:PC61BM organic photodetectors (OPDs) with a flexible perovskite quantum dots (QDs) embedded polymer scintillator. The flexible perovskite QDs scintillator exhibits high radioluminescence with emission peak centers at the 537 nm, which falls in maximum absorption range of poly(3-hexylthiophene) (P3HT). The OPD, with 2\,\mu {\text{m }}active layer, exhibits low dark currents in the range of tens of nanoampere per square centimeter over a wide reversed biased range. The OPD demonstrates detectable light signal down to {\text{0}}{\text{.1}}\,\mu {\text{W}}\,{\text{cm}}{{\text{ }}^{ - 2}} and low dose detection capability. The coupling of perovskite QDs scintillator and OPD shows a sensitivity of 638 e nGy−1 mm−2 \left( {{\text{10}}{\text{.2 }}\mu {\text{C G}}{{\text{y}}^{ - {\text{1}}}}{\text{ c}}{{\text{m}}^{ - {\text{2}}}}} \right) at a dose rate of 1 mGy s−1, which brings the possibilities of realizing highly bendable x-ray PDs.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Md Shohanur Rahman,Ruonan Liu,Chengxin Ye,Muhammad Tahseen Nawaz Khan,Chuanguang Qin,Tingting Xu
The urgent global need for clean, renewable energy has fueled extensive research into effective photocatalysts for hydrogen (H 2 ) production. While cesium lead halide perovskites (CsPbX 3 , X = Cl, Br, and I) have shown promise for visible light absorption, g-C 3 N 4 is recognized for its stability and Solid UV absorption spectra were recorded using diffuse reflectance on 10 mg powder samples pressed into uniform pellets to ensure a consistent illuminated area. Herein, two types of CsPbBr 3 perovskites with the morphology of nanosheet (PNS) and nanocrystals (PNC) are synthesized using supersaturated recrystallization and aqueous phase exfoliation method, respectively, and then combined with the g-C 3 N 4 to fabricate CsPbBr 3 perovskite/g-C 3 N 4 composites in different ratios, respectively. The as-prepared composites were tested as photocatalysts in water-splitting reactions to create H 2 in visible light conditions. The photocatalytic results revealed that 60 % PNS/g-C 3 N 4 and 20 % PNC/g-C 3 N 4 had the highest hydrogen evolution rate (HER) of approximately 2707.08 μmol∙h −1 ∙g −1 and 2299.17 μmol∙h −1 ∙g −1 , respectively, surpassing the HER of both pristine CsPbBr 3 and pure g-C 3 N 4 , which are 1.65 and 1.40 times higher than authentic g-C 3 N 4 . This research draws attention to the remarkable potential of CsPbBr 3 /g-C 3 N 4 composites in achieving efficient HER for H 2 production among their respective series.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yujie Chen,Fanlei Qin,Jiawen Wang,Kai Yang,Yinyan Li,Gongxun Bai
Perovskite quantum dots with halogen elements (Cl, Br, I) have been extensively studied due to their unique optoelectronic properties. However, the spectral properties of luminescent materials continue to present challenges in perovskite quantum dot glasses. Here, Eu3+-doped CsPbBr3 quantum dot glasses were successfully prepared. Meanwhile, optimizing the doping concentration of Eu3+ significantly improved the formation of quantum dots and enhanced their fluorescence intensity. After a heating–cooling cycle, the CsPbBr3:0.5% Eu3+ glass still retained 95% of its initial value. By coating CsPbBr3:0.5% Eu3+ glass powder with red phosphor on a blue chip, a white LED with a CCT of 5417 K can be prepared. Therefore, Eu3+-doped CsPbBr3 quantum dot glasses demonstrate significant potential as an efficient material for optical lighting applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Meng-Xin Li,Jin-Zhao Huang,Kai-Zheng Song,Wan-Ying Yao,Feng-Lei Jiang
All-inorganic cesium lead halide perovskites are emerging as a new promising candidate material in light-emitting diodes, photovoltaics, and photodetectors owing to their outstanding optical and electrical properties. However, blue perovskites still lag far behind the green and red analogues in terms of efficiency and stability. To avoid phase separation with mixed halide perovskite nanocrystals (e.g., CsPbBrxCl3–x), blue-emitting perovskites with a quantum confinement effect are very attractive. In this work, we designed a postsynthetic modification strategy with didodecyldimethylammonium bromide (DDAB) and lead bromide (PbBr2) to achieve blue-emitting CsPbBr3 nanocrystals (NCs) with nearly perfect surface passivation and excellent stability. The synergistic effect of DDAB and PbBr2 inhibited the possible perovskite phase transformation caused by DDA+, repaired the damaged [PbBr6]4– octahedra after purification, and created a halide-rich environment on the surface of NCs, thus maximizing the passivation of surface vacancy defects. In addition, the relatively short-chain, proton-free DDAB partially replaced the original organic ligands on the surface of NCs, resulting in near-unity photoluminescence quantum yield (PLQY) and remarkable stability. After 14 days of continuous ultraviolet irradiation at 365 nm, the PLQY of NCs was close to 100% and the photoluminescence (PL) spectrum remained almost unchanged. The PLQY of NCs remained greater than 90% after either continuous heating in an oil bath at 80 °C for 14 days or storage in the air for 2 months. This study demonstrates an effective approach to obtaining highly bright and stable blue perovskite NCs, which is expected to be used in optoelectronic devices, and provides strategies for future surface ligand engineering of perovskites.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Optical Materials
·
2025
·
IF 3.8
Hui-Lian Zhou,Ya-Yang He,Yong Wang,Cheng-Yang Zhou,Hong-Wei Hu,Yun Zhang,Guang-Gui Cheng
All-inorganic lead bromide perovskite CsPbBr3 has garnered considerable attention due to its high thermal stability and rapid radiative recombination. Unfortunately, it is still a big challenge to further improve the efficiency and stability of the CsPbBr3 film via the solution processing technique. In this study, we report a method to enhance the CsPbBr3 film quality via annealing at a low temperature of 38 °C. The low-temperature annealing slows the phase transition, allowing for the orderly arrangement of crystal orientations and a surface with fewer defects. With this method, the fabricated CsPbBr3 PeLED exhibits great stability and bright luminescence, achieving an external quantum efficiency (EQE) of 8.21%. The PeLEDs fabricated at 38 °C demonstrated a low turn-on voltage of 1.5 V, with high current densities of 66.8 mA/cm2 at 2.0 V and 371 mA/cm2 at 3.0 V. These results provide valuable insights for the realization of high-efficiency and high-stability PeLEDs for lighting and display applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Chenrun Liu,Ziqi Wu,Peisheng Nong,Qiuting Cai,Xingliang Dai,Bobo Li,Haiping He,Wang Zhang,Mingxia Qiu
Perovskite light-emitting diodes (PeLEDs) have significant potential for display and lighting applications. However, the intrinsic issues such as material stability, efficiency limitation, spectral purity and color gamut challenges have hindered the development process. In this work, the efficient blue light PeLEDs were obtained through multiple modifications of doping strategy and surface passivation. Incorporating NdCl3 into CsPbBr3 perovskite nanocrystals (PeNCs) causes lattice contraction and improves crystallization quality, thereby increasing the photoluminescence quantum yield (PLQY) and reducing non-radiative recombination. Further homogeneous passivation with didodecyl dimethylammonium chloride (DDAC) can effectively fill the halogen vacancies on the surface of PeNCs, thus to reduce surface defects. Ultimately, the PeLEDs achieved a highest external quantum efficiency (EQE) of 15.74% at the emission wavelength of 478 nm. This study can provide important insights into the multi-component regulation of high-performance blue light PeLEDs and build the foundation for their practical application in full-color display.
✓ 已验证
产品关联
DOI
高影响因子
ACS Photonics
·
2025
·
IF 6.7
Shoujie Ye,Luoting Yang,Zhan Su,Fuyi Cao,Cong Wang,Xinyue Sun,Jiacong Guo,Xiaobo Hu,Yang Mei,Guoen Weng,Hidefumi Akiyama,Shaoqiang Chen
Perovskite quantum dots (PQDs) have garnered significant attention as promising gain media for laser applications due to their excellent optical properties. However, the dynamic binding behavior of conventional long-chain insulating ligands (oleic acid/oleylamine, OA/OAm) to QD surfaces inherently generates unfavorable defect states, exacerbating nonradiative recombination and fundamentally limiting their optoelectronic performance. In this work, we report a facile room-temperature synthetic strategy for high-performance CsPbBr3 PQDs by utilizing β-cyclodextrin (β-CD) instead of a mixed OA/OAm solution as a ligand. The β-CD-encapsulated CsPbBr3 PQDs present a maximum of 556% enhancement in photoluminescence (PL) intensity under an ambient environment compared to the OA/OAm-ligand counterparts. The pump power-dependent PL measurements reveal a 38% higher internal quantum efficiency, and further analysis based on a Bose–Einstein statistical model indicates a reduced defect density and superior excitonic recombination in such β-CD-modified PQDs. Additionally, by employing the PQDs as a gain medium, we successfully demonstrate a room-temperature single-mode surface-emitting laser with stable outputs and a low lasing threshold. This work not only presents a significant step forward in PQD synthesis and surface ligand engineering but also provides guidance for developing high-performance optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yu Liu,Li Chen,Shaohong Li,Zejiang Gao,Yuping Pang,Bingsuo Zou
Metal halide perovskites have emerged as promising candidates for self-powered photodetectors due to their exceptional optoelectronic properties, including low exciton binding energies, high absorption coefficients, superior charge transport properties, and solution processability. However, the inherent high dark current in perovskite-based devices remains a fundamental limitation to their performance. In this study, we present an interface engineering strategy to overcome this challenge by incorporating a self-assembled monolayer (SAM) between the TiOx electron transport layer and the CsPbBr3 perovskite quantum dot film. Comprehensive experimental analysis indicates that the SAM layer performs a critical dual function: it effectively blocks interfacial electron injection as a charge barrier and promotes higher quality perovskite films through crystallinity optimization and defect passivation, ultimately suppressing non-radiative recombination. This synergistic effect results in a reduction of dark current to an ultralow value of 2.13 × 10−10 A. The optimized photodetector exhibits high-performance metrics at zero bias under 365 nm illumination, achieving an outstanding on/off ratio of 7.6 × 106, a high specific detectivity of 2.74 × 1012 Jones, and an extensive linear dynamic range of 137.7 dB. Furthermore, the device demonstrates exceptional environmental stability, maintaining 91.8% of its initial efficiency after 120 days of storage in a nitrogen atmosphere without encapsulation. This work establishes a universal approach for defect suppression in perovskite optoelectronics, with potential applications extending to solar cells, light-emitting diodes, and radiation detectors.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 22
·4423
·
IF 4.6
Xinyu Sun,Yuxia Yin,Xiaolin Xia,Teng Zhang
During the growth of lead halide perovskite single crystals (SCs) with the conventional inverse temperature crystallization (ITC) method, the blast nucleation of the precursor under supersaturation conditions is always unavoidable. In the current study, three kinds of additives namely methanol (MOE), ethyl alcohol (EtOH), and polyethylene glycol (PEG) are introduced to regulate the growth of CsPbBr3SCs. Benefiting from the strong anchoring hydroxy groups (-OH) with the Pb2+species, large-sized CsPbBr3crystals with reduced defect densities were prepared (PEG-regulated). In addition, the viscosity of the precursor solution increases after adding PEG additive, which provides a more stabilized environment for crystal growth. Finally, the photodetectors prepared from our PEG-tuned CsPbBr3SCs show a responsivity of 2.25 A/W and a detectivity of 6.06 × 1011Jones, demonstrating the potential of CsPbBr3SCs for photo-detecting applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2019
·Vol. 12
·期 8
·1215
·
IF 2.972
Xu Zhang,Qing Li,Shikai Yan,Wei Lei,Jing Chen,Khan Qasim
Taking advantage of a large light absorption coefficient, long charge carrier diffusion length and low-cost solution processing, all-inorganic halides perovskite CsPbBr3quantum dots (QDs) are combined with a ZnO QD film to construct a high-performance photodetector. In this work, a novel photodetector device based on transistor structure with dual active layers composed of CsPbBr3and ZnO film is proposed. In this structure, CsPbBr3film functions as the light-absorbing layer and ZnO film acts as the conducting layer. Owing to the high electron mobility and hole-blocking nature of the ZnO QDs film, the photo-induced electron-hole pairs can be separated efficiently. As a result, the device exhibits high performance with response of 43.5 A/W, high detection up to 5.02 × 1011Jones and on/off ratio of 5.6 × 104under 365 nm light illumination. Compared with the ZnO-only phototransistor (the photodetector with the structure of transistor) the performance of the CsPbBr3phototransistor showed significant improvement, which is superior to the majority of photodetectors prepared by perovskite. This work demonstrates that the ZnO QDs film can be applied in the photodetector device as a functional conducting layer, and we believe that the hybrid CsPbBr3/ZnO phototransistor would promote the development of low-cost and high-performance photodetectors.
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2020
·Vol. 64
·期 4
·798-807
·
IF 6.098
Du Jian,Duan Jialong,Duan Yanyan,Tang Qunwei
All-inorganic CsPbBr 3 perovskite solar cells (PSCs) are promising candidates to balance the stability and efficiency issues of organic-inorganic hybrid devices. However, the large energy barrier for charge transfer and narrow spectral response are still two challenging problems for performance improvement. We present here an organic bulk-heterojunction {poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl C61 butyric acid methyl ester (P3HT: PCBM)} photoactive layer to boost the charge extraction and to widen the spectral absorption, achieving an enhanced power conversion efficiency up to 8.94% by optimizing the thickness of P3HT: PCBM photoactive layer, which is much higher than 6.28% for the pristine CsPbBr 3 device. The interaction between the carbonyl group in PCBM and unsaturated Pb atom in the perovskite surface can effectively passivate the defects and reduce charge recombination. Furthermore, the coupling effect between PCBM and P3HT widens the spectral response from 540 to 650 nm for an increased short-circuit current density. More importantly, the devices are relatively stable over 75 days upon persistent attack by 70% relative humidity in air condition. These advantages of high efficiency, excellent long-term stability, cost-effectiveness and scalability may promote the commercialization of inorganic PSCs.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Ying Liu,Bingfeng Shi,Qian Liu,Changli Lü
All-inorganic perovskite quantum dots (PQDs) have received great attention in the field of optoelectronics because of their excellent optical properties . However, the application of perovskite is always limited because of its poor stability. Herein, the CsPbBr 3 PQDs were stabilized by two-dimensional (2D) nanosheets of layered double hydroxide (LDH) for the first time using a simple one-pot in-situ growth route. In the as-synthesized LDH/CsPbBr 3 nanocomposite, CsPbBr 3 PQDs are uniformly attached to the surface of the LDH nanosheets . The resulted composite powder showed good green-luminescence, high solid PLQY (∼41%), narrower FWHM (∼20.0 nm), long fluorescence lifetime, excellent humidity stability and photostability. The unique 2D structured LDH nanosheets imparts significantly enhanced stability to LDH/CsPbBr 3 composite. All these advantageous properties make the LDH-based fluorescent composite good candidate for flat-panel displays and lighting devices. Our research proposes a novel method to stabilize PQDs by using inorganic 2D nanosheet materials and provides new opportunities for the applications of perovskite in optoelectronic field such as white light-emitting diode (LED).
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）