TALANTA
·
2023
·
IF 6.1
Yan Wang,Jin Shen,Ruilong Song,Qin Xu,Xiaoya Hu,Yun Shu
Rapid and highly sensitive detection of tumor marker (TM) is critical for the early diagnosis and treatment of cancers. Herein, utilizing highly bright and water-stable CsPbBr 3 perovskite nanocrystals (NCs) capped with amphiphilic polymer ligand of octylamine-modified polyacrylic acid (OPA) and gold nanoparticles (AuNPs) as reporters, a lateral flow immunoassay (LFIA) strip is developed for fluorescence and colorimetric dual-mode detection of carcinoembryonic antigen (CEA). The prepared CsPbBr 3 NCs capped by an amphiphilic polymeric of OPA ligand showed high stability and bright fluorescence. Moreover, the AuNPs immunoprobes were captured with CEA antigen and quench the green fluorescence of CsPbBr 3 /OPA NCs on the T line due to the inner filter effect (IFE). Therefore, CEA could be quantitative analyzed by the dual-readout of fluorescence and colorimetric signal. The detection limits of CEA can reach as low as 0.023 ng/mL and 0.027 ng/mL for the fluorescence and colorimetric mode, respectively. Good specificity and reproducibility were also demonstrated for this method. Finally, the CsPbBr3/OPA NCs-based LFIA showed good accuracy in detection of CEA level from clinical serum samples. This work firstly enables the application of CsPbBr 3 perovskite NCs in a LFIA, displaying great potential in point-of-care clinical diagnosis.
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DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xinquan Gong,Xiaoming Hao,Junjie Si,Yunzhou Deng,Kai An,Qianqing Hu,Qiuting Cai,Yun Gao,You Ke,Nana Wang,Zhuopeng Du,Muzhi Cai,Zhizhen Ye,Xingliang Dai,Zugang Liu
Developing green perovskite light-emitting diodes (PeLEDs) with a high external quantum efficiency (EQE) and low efficiency roll-off at high brightness remains a critical challenge. Nanostructured emitter-based devices have shown high efficiency but restricted ascending luminance at high current densities, while devices based on large-sized crystals exhibit low efficiency roll-off but face great challenges to high efficiency. Herein, we develop an all-inorganic device architecture combined with utilizing tens-of-nanometers-sized CsPbBr3 (TNS-CsPbBr3) emitters in a carrier-confined heterostructure to realize green PeLEDs that exhibit high EQEs and low efficiency roll-off. A typical type-I heterojunction containing TNS-CsPbBr3 crystals and wide-bandgap Cs4PbBr6 within a grain is formed by carefully controlling the precursor ratio. These heterostructured TNS-CsPbBr3 emitters simultaneously enhance carrier confinement and retain low Auger recombination under a large injected carrier density. Benefiting from a simple device architecture consisting of an emissive layer and an oxide electron-transporting layer, the PeLEDs exhibit a sub-bandgap turn-on voltage of 2.0 V and steeply rising luminance. In consequence, we achieved green PeLEDs demonstrating a peak EQE of 17.0% at the brightness of 36,000 cd m–2, and the EQE remained at 15.7% and 12.6% at the brightness of 100,000 and 200,000 cd m–2, respectively. In addition, our results underscore the role of interface degradation during device operation as a factor in device failure.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhentong Lu,Zhiqiang Tang,Haoran Zhang,Wei Li,Jianle Zhuang,Chaofan Hu,Yingliang Liu,Bingfu Lei,Xuejie Zhang
In situ precipitation of CsPbBr 3 quantum dots within glass (CsPbBr 3 QDs@galss) is considered as one of the effective methods to overcome their instability and achieve practical applications. However, challenges such as low photoluminescence quantum yield (PLQY), poor thermostability and photostability still persist. Herein, we modulated the rigidity of the glass network structure by adjusting the SiO 2 content in the phosphate glass matrix. This strategy allowed us to successfully fabricate CsPbBr 3 QDs@glass composites with excellent crystallinity and luminescence properties. This composite exhibits a narrow-band emission at 515 nm with a remarkable PLQY up to 72 % under 455 nm excitation, 1.7 times higher than that of unintroduced SiO 2 . Moreover, it retains approximately 30 % of its initial luminescence intensity even at a high temperature of 373 K. Meanwhile, the fabricated green LED maintains its luminescence intensity at about 93 % of the initial value after 120 h of continuous operation. To demonstrate its conceptual application, an LCD screen was also assembled using a white LED lighting strip based on CsPbBr 3 QDs@glass that shows outstanding color reproduction and color saturation.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 39
·2206838
·
IF 19.924
Jingwei Zhu,Benlin He,Wenyu Zhang,Rui Tui,Haiyan Chen,Yanyan Duan,Hao Huang,Jialong Duan,Qunwei Tang
One of the key problems to improving the performance of a typical perovskite solar cell (PSC) is to minimize the defect-determined nonradiative recombination. So far, the cutting-edge strategies mainly focus on the film-scale defect manipulation at grain boundaries and surfaces by trial-and-error, but the intrinsic passivation mechanism and fundamental guideline in the perspective of crystal lattices are still unclear. Herein, a much lower defect formation energy of Pb Br antisite defect at (110) plane than that at (h00) planes is demonstrated by theoretically studying the crystal plane-dependent defect density in an inorganic CsPbBr 3 film, and then the authors precisely control the plane growth by selectively anchoring (pseudo-) halide anions from ionic liquids to (110) plane. Because of the different adsorption energies on various planes, the growth of defective (110) plane is suppressed, leading to the formation of (h00) plane-oriented film. Finally, the all-inorganic CsPbBr 3 PSC passivated by ionic liquid EMImCl delivers the best efficiency of 10.71% with an open-circuit voltage up to 1.650 V. This work provides an in-depth insight into defect formation and passivation mechanism to stabilize perovskite photovoltaics.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 25
·6224-6233
·
IF 5.256
Lin Zhou,Kai Yu,Fan Yang,Hui Cong,Nan Wang,Jun Zheng,Yuhua Zuo,Chuanbo Li,Buwen Cheng,Qiming Wang
In the current work, we fabricate an all-inorganic perovskite quantum dot-based photodetector with bifunctional linker molecules, which is highly superior to its counterpart without the linker. The ultrahigh on/off ratio of 105 is two orders of magnitude higher than that of the device without the ligand treatment. Moreover, the responsivity increases from ∼2.2 A W−1 to ∼24.5 A W−1 and the detectivity from 3.5 × 1012 Jones to 8.9 × 1013 Jones. To gain further insight into the effect of ligand-exchange by bifunctional linker molecules besides surface passivation, we divide the electron transfer process into two parts, the electron transfer from quantum dots (QDs) to the linker and from the linker to TiO2. Injection of photoexcited electrons from colloidal CsPbBr3 QDs into TiO2 nanoparticles by bifunctional linker molecules is found to be much faster. Continuous-wave and time-resolved fluorescence spectra exhibit strong quenching for CsPbBr3 QDs assembled by the linker or coupled to TiO2 nanoparticles, which is consistent with electron transfer for QDs. From the results of the transient absorption measurement and fluorescence lifetime, the electron transfer time of QDs–TiO2 linked by the bifunctional molecules is calculated to be within 40 ns, while that from QDs to TiO2 particles directly is estimated to be ∼290 ns. This indicates that much faster electron injection occurs under the effect of the electron linker. In addition, the linker molecule modification can improve the adsorption of mp-TiO2 to capture more QDs.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 18
·6146-6151
·
IF 4
Jie Dou,Jin Tan,Benlin He,Jialong Duan,Qunwei Tang
All-inorganic CsPbBr3 perovskite solar cells have received growing attention in the photovoltaic field due to their high stability, low cost, and simple preparation processes. However, the high-density defects in perovskite films and the large energy differences at interfaces have been the main challenges for achieving high power conversion efficiency and good stability. In this work, nickel oxide (NiOx) decorated graphene oxide (GO) is used as a hole collector at the perovskite/carbon interface for a carbon-based CsPbBr3 perovskite solar cell. The crystallinity of the CsPbBr3 perovskite layer and the hole extraction ability are markedly enhanced because of the p-type charge transfer doping of GO from oxygenic groups to NiOx. Finally, the all-inorganic CsPbBr3 perovskite solar cell achieves a power conversion efficiency of 8.59%. More importantly, the best solar cell free of encapsulation retains 94.2% of its initial efficiency in an air environment over 21 days.
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DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 11
·2200336
·
IF 9.173
Jian Song,Yifan Ren,Shijie Gong,Liang Zhao,Wufan Xuan,Lei Zhu,Yulong Zhao,Yinghuai Qiang,Lili Gao,Sheng Huang
Crystal silicon solar cells being the most successful photovoltaic devices have prevailed in the energy market for decades. To further improve the device performance, photon management is necessary. Herein, a CsPbBr 3 –Cs 4 PbBr 6 perovskite quantum dot@ZnO/ethylene vinyl acetate copolymer downshifting composite film is coated on the silicon solar cell. This downshifting composite film helps to convert high-energy (UV-blue) photons to relatively low-energy photons with a wavelength at about 500 nm, which possess higher sensitivity in silicon solar cells. The effects of tetra- n -heptylammonium bromide and Zn(C 2 H 5 ) 2 on composition, optical and luminescence properties of perovskite quantum dots are thoroughly investigated, and a clean quantum dot solution with strong luminescent intensity can be obtained. The perovskite quantum dot@ZnO/ethylene vinyl acetate composite film absolutely improves the efficiency of silicon solar cells by 1.18%. The value is much higher than pure ethylene vinyl acetate (0.42%) and composite film without ZnO (0.57%). Moreover, ZnO inclusion can inhibit Cs and Pb leakage and maintain the device working stability, which is helpful for their commercial application in the future. This study further reveals that the enhancement lies in carrier relaxation energy loss reduction. Herein, a low-cost downshifting composite film with excellent environmental stability for silicon solar cells applications is proposed.
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DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Jun Cheng,Shuanglong Yuan,Ludan Zhu,Long Chen,Chuanqi Liu,Hua Tong,Huidan Zeng
Cesium lead halide perovskite nanocrystals (CLHP NCs) have drawn considerable attention because of their promising optoelectrical properties. However, owing to the extreme vulnerability of CLHP NCs to water and polar alcohols, until now most synthesis approaches inevitably adopted ecounfriendly solvents. It is still a challenge to employ green polar alcohol (ethanol) as a solvent to synthesize CLHP NCs. In this work, we realized the room-temperature in situ synthesis of CsPbBr3/SiO2 sol entirely in ethanol by innovatively constructing amine-functionalized silica micelles, which originated from the synergistic effect of 3-aminopropyltriethoxysilane and tetraethylorthosilicate (TEOS) during an acid-catalyzed sol–gel process. The sol exhibited high stability and an absolute photoluminescence quantum yield of 61.9% in ethanol without a further modification process. The light-emitting intensity of the sol preserved for 34 days merely declined to 62.1%. This work sheds light on the less common strategy of directly synthesizing CsPbBr3 NCs and long-term stable preservation in a strongly polar solvent.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 17
·4359-4368
·
IF 7.779
Guiqiang Wang,Jiayu Bi,Jiarun Chang,Miao Lei,Huiling Zheng,Yu Yan
Narrowing the bandgap and promoting the quality of inorganic perovskites are the key points to improve the performance of inorganic perovskite solar cells. Herein, we incorporate Sn2+ into an inorganic CsPbBr3 perovskite to simultaneously tune the bandgap and improve the quality of the perovskite film. The density functional theory calculations demonstrate that the incorporation of Sn2+ leads to an obvious shift of the conduction band minimum of the CsPbBr3 perovskite towards the lower energy region. Therefore, the bandgap of CsPb1−xSnxBr3 perovskites is gradually reduced with the increase of the Sn2+ content. Additionally, when Pb2+ is substituted with an appropriate amount of Sn2+, the doped perovskite films display largely promoted quality compared to the undoped one. These advantages lead to the suppression of charge recombination and the enhancement of light harvesting in the as-fabricated perovskite solar cells (PSCs). Consequently, the CsPb0.95Sn0.05Br3-based PSC with a structure of FTO/TiO2 layer/perovskite/carbon delivers a greatly promoted power conversion efficiency of 8.04% compared with the efficiency of 5.93% for the controlled device. Moreover, the CsPb0.95Sn0.05Br3 PSC without any encapsulation preserves over 91% of its initial efficiency after 720 h of storage in ambient air, suggesting an excellent stability.
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DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 17
·175203
·
IF 3.404
Yan Meng,Xiaoyan Wu,Ziyang Xiong,Chunyan Lin,Zuhong Xiong,Ethan Blount,Ping Chen
Compared to organic–inorganic hybrid metal halide perovskites, all-inorganic cesium lead halides (e.g, CsPbBr3) hold greater promise in being emissive materials for light-emitting diodes owing to their superior optoelectronic properties as well as their higher stabilities. However, there is still considerable potential for breakthroughs in the current efficiency of CsPbBr3 perovskite light-emitting diodes (PeLEDs). Electrode quenching is one of the main problems limiting the current efficiency of PeLEDs when poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) is used as the hole injection layer. In this work, electrode quenching control was realized via incorporating Au NPs into PEDOT:PSS. As a result, the CsPbBr3 PeLEDs realized an improvement in maximum luminescence ranging from ∼2348 to ∼7660 cd m−2 (∼226% enhancement) and current efficiency from 1.65 to 3.08 cd A−1 (∼86% enhancement). Such substantial enhancement of the electroluminescent performance can be attributed to effective electrode quenching control at the PEDOT:PSS/CsPbBr3 perovskite interface via the combined effects of local surface plasma resonance coupling and enhanced hole transportation in the PEDOT:PSS layer by Au nanoparticles.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Chen Wang,Feiyang Zhang,Penglei Xu,Huiluan Qin,Qi Shen,Chunyan Sun
The formation of Br vacancies is the core factor leading to significant impairment of CsPbBr 3 ′s stability. Herein, we ingeniously designed an endogenous bromine species synergistic stabilization strategy by constructing a CsPbBr 3 /Cs 4 PbBr 6 heterojunction photocatalyst and decabromodiphenyl ether (BDE209) degradation. Via precise control of the Cs 2 CO 3 /PbBr 2 stoichiometric ratio, the optimal sample (CPB-0.8) exhibited exceptional BDE209 debromination activity with a rate constant of 0.275 min −1 and nearly complete degradation within 10 min under visible light (λ > 400 nm). More importantly, it shows significantly enhanced stability compared to pure single-phase CsPbBr 3 . Structural characterizations confirmed that Cs 4 PbBr 6 in the heterojunction acts as a stabilizing phase. It dissolves in situ to release CsBr, which dynamically passivates Br vacancies on CsPbBr 3 surfaces, preventing CsPbBr 3 from transforming to inactive Cs 2 PbBr 5 . Meanwhile, bromine species released during BDE209 degradation further assist in suppressing the formation of Br vacancies and halide ion loss in CsPbBr 3 . This work demonstrates the potential synergistic effect between the efficient degradation of halogenated pollutants and the stabilization of halogen vacancies of metal halide perovskites.
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DOI
高影响因子
CRYSTENGCOMM
·
2026
·
IF 2.4
Pengfei Ouyang,Weiwei Li,Dingshan Zheng,Nian Cheng,Han Pan
All-inorganic CsPbBr3 perovskite solar cells exhibit excellent humidity and thermal stability compared with organic-inorganic hybrid perovskite solar cells. However, the proposed two-step spin-coating method for fabricating CsPbBr3 film using highly concentrated CsBr/H2O solution in the second step is prone to result in CsPbBr3 film with high defect density, which greatly limits the performance of CsPbBr3 perovskite solar cells. In this study, appropriate amount of NH4Ac is used as additive in the CsBr/H2O solution. The interaction of NH4Ac with CsPbBr3 could contribute to smooth and densified CsPbBr3 perovskite films with suppressed defect density. When carbon electrode based CsPbBr3 perovskite solar cells are fabricated, an optimized photovoltaic conversion efficiency of 8.77% is achieved using 0.50 mg mL-1 NH4Ac in CsBr/H2O solution, which is 23.35% higher than that of the reference perovskite solar cell (champion PCE = 7.11%). Furthermore, the optimized CsPbBr3 perovskite solar cell exhibits better long-term stability, which can maintain more than 85% of its initial efficiency after being placed for 30 days at an ambient temperature of 25 °C and a relative humidity of 30%~40%.
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DOI
高影响因子
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