Frontiers in Chemistry
·
2025
·
IF 4.2
Xianqi Wei,Jiayi Lu,Silong Zhang,Jiashu Tang,Shichao Wu,Tengbo Lv,Xiaoli Wang
CsPbBr 3 (CPB) perovskite has demonstrated unique advantages as a photoelectric material. However, its stability and optoelectronic properties exhibit significantly susceptibility to environmental conditions during practical applications. Additionally, the synthesis of CPB often involves complex procedures and stringent requirements for the experimental environment, resulting in low yield. In this study, we employed an aqueous-phase synthesis method to incorporate strontium into CPB, aiming to enhance the long-term stability of the perovskite in aqueous solutions. And the introduction of strontium (Sr) is expected to improve the photoluminescent properties of the perovskite. The results demonstrate that the synthesized perovskite remains stable in aqueous solution for up to 264 h, with enhanced photoluminescence intensity and a blue shift attributed to the incorporation of strontium. This approach significantly increases the potential value of CPB perovskite for applications in optoelectronic materials and devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Xudong Wu,Ruijie Xu,Xianli Li,Ruosheng Zeng,Binbin Luo
As a potential candidate for photocatalytic CO2 reduction, CsPbX3 perovskite nanocrystals (PNCs) have attracted enormous attention due to their suitable energy band structure and large molar extinction coefficient for visible light. However, the catalytic performance on CO2 reduction is greatly limited due to the intrinsically fast radiative recombination and poor stability of PNCs. In this work, PbS nanoparticles are uniformly anchored on CsPbBr3 PNCs with the assistance of a bridged amino acid due to the directed interaction between −COO– (−NH3+) and Pb2+ (Br–). Because of the small lattice mismatch between PbS and CsPbBr3, the introduction of PbS significantly quenches the emission of CsPbBr3 and boosts the interfacial charge transfer, thereby resulting in an enhanced photoelectrocatalytic CO2 reduction rate of ∼2.94 and 0.36 μmol cm–2 h–1 for CO and CH4 products, which are ∼2.4 times higher than that of pristine CsPbBr3 PNCs, respectively. This work provides a universal strategy of constructing homogeneous nanocomposites for catalytic applications.
研究领域:
材料科学
·
光催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 6
·3380-3389
·
IF 3.361
Mukerem Helil Abib,Junchun Li,Heming Yang,Man Wang,Taotao Chen,EnzeXu,Yang Jiang
All inorganic carbon-based planar perovskites, particularly CsPbBr3, have attracted considerable attention due to their excellent stability against oxygen, moisture, and heat for photovoltaic utilization. However, the power conversion efficiency of carbon-based planar CsPbBr3 perovskite solar cells is mostly low, primarily because of the inferior film quality with undesirable crystallization and narrow light absorbance ranges. Herein, we develop a novel direct deposition approach combined with Sn doping to achieve highly efficient and stable carbon-based Sn-doped CsPbBr3 perovskite solar cells. Mass-scale Sn ion-doped CsPbBr3 perovskite powder was effectively synthesized and characterized via a facile strategy by adding hydrohalic acid in the CsBr, PbBr2 and SnBr2 precursor in a dimethyl sulfoxide solution. Moreover, using the as-synthesized CsPbBr3 and Sn-doped CsPbBr3 perovskite powder, PSCs were obtained via effective direct thermal evaporation. A smooth, constant and pinhole-free perovskite film was achieved with a configuration of FTO/TiO2/Sn:CsPbBr3/carbon. PSCs based on Sn:CsPbBr3 as an absorber and carbon as the HTM achieved an impressive power conversion efficiency of 8.95% compared to 6.87% for undoped CsPbBr3; moreover, it displayed admirable stability in an open-air atmosphere for an operational period of about 720 h without a noticeable negative result. The introduction of the Sn ion may advance the interface extraction of charge between the electric transport layer to the absorber layer and absorber to the carbon electrode. Accordingly, the Sn ion doping on CsPbBr3 during the synthesis phase and the direct evaporation paves a novel approach for intended photovoltaic applications.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Yuanyi Liu,Tianxing Xiang,Bing Zhang,Jize Wang,Xinxin Yu,Yueyue Xiao,Junyan Xiao,Zhiliang Ku,Yong Peng
Current CsPbBr3 perovskite solar cells still suffer from a high open-circuit voltage (Voc) loss due to the high defect density. Herein, we demonstrate a strategy to passivate defects and induce Fermi level modification through BaI2 doping. The carrier lifetime is significantly extended after adding BaI2. In addition, the Fermi level is changed as Ba2+ enters the crystal lattice, which increases the built-in potential and promotes the transport of carriers. As a result, the optimized thermally evaporated device shows a record Voc of 1.551 V and an improved power conversion efficiency of 10.09% as well as excellent thermal stability.
研究领域:
材料科学
·
光伏技术
✓ 已验证
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.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yiyuan Peng,Mengbiao Liang,Ting Chen,Mengdi Zhao,Zhixiang Xie,Chunxian Guo
All-inorganic perovskite nanocrystals (CsPbX 3 NCs, X = Cl, Br, I) have emerged as promising candidates for applications in light-emitting diodes (LEDs), solar cells, photodetectors, and backlight displays, owing to their exceptional optoelectronic properties, including high photoluminescence quantum yield (PLQY), long carrier lifetimes, and narrow emission bandwidths. However, the intrinsic ionic nature of these nanocrystals renders them highly susceptible to environmental degradation, limiting their practical applications. Herein, we report the synthesis of CsPbBr 3 @MOF-5 composites through a physical mixing method: room-temperature supersaturated recrystallization of CsPbBr 3 NCs, followed by encapsulation within a hierarchical porous zinc-based metal-organic framework (MOF-5). By incorporating poly(ethylene oxide)-block-poly(propyleneoxide)-block-poly(ethylene oxide) Pluronic (P123) and 1,3,5-trimethylbenzene (TMB) as structure-directing agents, the pore architecture of MOF-5 was tailored to exhibit hierarchical porosity (2-35 nm), significantly enhancing both the PLQY and stability of CsPbBr 3 NCs. The CsPbBr 3 @MOF-5 composites achieved a remarkable PLQY improvement from 22% to 56%, retained 55% of their initial PL intensity after 60 days of ambient storage, and maintained 65% of PL emission under thermal stress (298-498 K). In contrast, pristine CsPbBr 3 NCs experienced complete quenching under identical conditions. Additionally, the composite exhibited superior resistance to anion exchange when combined with CsPbBr x I 3-x NCs. A white LED (WLED) device fabricated using CsPbBr 3 @MOF-5 composite and K 2 SiF 6 :Mn 2+ (KSF) red phosphor exhibited a luminous efficiency of 20.71 lm/W, a correlated color temperature (CCT) of 5486 K, and a broad color gamut covering 133.3% of the National Television Standards Committee (NTSC) standard, underscoring its potential for advanced lighting and display technologies.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Jintao He,Chang Liu,Jianlin Chen,Yu Zou,Wenxia Ye,Ruoxi Yang,Jincheng Huang,Zhuoyin Peng,Jian Chen
Low temperature solution-processed SnO 2 is favorable for electron transport layer (ETL) of flexible perovskite solar cells (PSCs) owing to their process compatibility. Here, we propose a route of condensation reflux-processed SnO 2 ETLs for PSCs using SnCl 2 source. However, the low temperature SnCl 2 -derived SnO 2 ETLs are inherently associated with a high defect state density as well as a large amount of H + and Cl - residual on the surface, which will cause open-circuit voltage ( V OC ) loss of the devices. To tackle this issue, aqueous solutions of KOH, CsOH, and KCl have been employed to regulate the buried interfaces. The effects of different cations (K + and Cs + ) and anions (OH - and Cl - ) on the photovoltaic performance of the devices have been comparatively explored. The buried interface with KOH modification showed the best effect, which not only improved the quality and light absorption of CsPbBr 3 perovskite layer but also markedly reduced the defect state density at the interface. The optimal device with an architecture of FTO/SnO 2 /KOH/CsPbBr 3 /carbon exhibited a champion power conversion efficiency (PCE) of 7.80 %, V OC of 1.46 V, short-circuit current density ( J SC ) of 7.50 mA/cm 2 , and fill factor ( FF ) of 0.71, compared with the pristine counterpart with a PCE of 5.86 %, V OC of 1.40 V, J SC of 6.37 mA/cm 2 , and FF of 0.66, respectively. The strategy of low temperature-processed SnO 2 ETLs by KOH interface modification may also provide an avenue for other-typed flexible PSCs manufacture.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Anling Tong,Xuanheng Chen,Yang Wang,Yuhong Wang,Qingshui Zheng,Ruowei He,Zhihang Jin,Weihai Sun,Yunlong Li,Jihuai Wu
The all-inorganic CsPbBr3 perovskite solar cells exhibit excellent stability against humidity and thermal conditions as well as relatively low production cost, rendering them a gradually emerging research hot spot in the field of photovoltaics. However, the absence of a hole transport layer (HTL) in its common structure and the substantial energy level difference of up to 0.6 eV between the highest occupied molecular orbital (HOMO) level of CsPbBr3 and the work function of the carbon electrode have emerged as the primary factor limiting the improvement of its power conversion efficiency (PCE). In this work, the monomer 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT) is spin-coated onto the surface of the CsPbBr3 film directly and then subjected to annealing; DBEDOT undergoes in situ polymerization to form poly(3,4-ethylenedioxythiophene) (PEDOT), which aims to ameliorate the issue of excessive energy level difference between CsPbBr3 and the carbon electrode, and to facilitate the extraction and transport efficiency of holes between the CsPbBr3 perovskite and the carbon electrode. Compared to the pristine device, the PCE of the device based on in situ polymerization is enhanced and achieves a maximum efficiency of 9.81%. Furthermore, the unencapsulated devices based on in situ polymerization maintain 95.9% of their original efficiency after 40 days of stability testing.
研究领域:
材料科学
·
光伏技术
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Juanjuan Xue,Danyang Chen,Huamei Zhang,Li Guo,Pengcui Li,Dan Han,Xing Guo,Qianqian Duan,Shengbo Sang
The low stability and high toxicity of CsPbBr3 perovskite nanocrystals (PNCs) greatly limit their application in the biological field. Here, six different CsPbBr3 PNCs were prepared by ligand-assisted reprecipitation (LARP) and hot injection using oleic acid (OA), oleamine (OAm), (3-Aminopropyl) triethoxysilane (APTES) modification and SiO2 coating, respectively. Different ligands, shells, and synthesis methods give CsPbBr3 PNCs diverse optical properties, stability, and biocompatibility. Among them, OA-OAm-APTES-CsPbBr3@SiO2 has the highest photoluminescence quantum yield (PLQY) (80.74%) and higher stability (fluorescence intensity remains 70% after 15 days in an atmospheric environment). OA-OAm-APTES-CsPbBr3@SiO2 (30 μg/mL) was cocultured with liver cancer cells for 12 h, and the survival rate was 80%, indicating high biocompatibility. Under the observation of the microplate reader, bright green fluorescence appeared in the cytoplasm, indicating that OA-OAm-APTES-CsPbBr3@SiO2 has great application potential in the field of bioimaging.
研究领域:
材料科学与工程
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 72
·42430-42437
·
IF 3.049
Shangxuan Huang,Sen Yang,Qi Wang,Ruirui Wu,Qiuju Han,Wenzhi Wu
Cs4PbBr6/CsPbBr3 perovskite composites are fabricated by room-temperature one-pot mixing synthesis, which is short in time, free from inert gases and delivers a high product yield. Temperature-dependent photoluminescence shows that a larger exciton binding energy of 291.1 meV exhibits better thermal stability compared with that of pure Cs4PbBr6 and CsPbBr3 materials. The CIE chromaticity coordinates (0.1380, 0.7236) of green LEDs designed with Cs4PbBr6/CsPbBr3 perovskite composites show almost no variation under driving current changing from 5 to 30 mA. Furthermore, the ground Cs4PbBr6/CsPbBr3 perovskite composites mixed with red emitting K2SiF6:Mn4+ phosphor are dropped and casted on a blue-emitting InGaN chip. The white light emitting diodes (WLEDs) are presented, which have good luminous efficiency of 65.33 lm W−1 at 20 mA, a correlated color temperature of 5190 K, and the white gamut with chromaticity coordinate of (0.3392, 0.3336). According to the state of art, these excellent characteristics observed are much superior to the reported results of conventional perovskite-based WLEDs, which demonstrate the immense potential and great prospect of Cs4PbBr6/CsPbBr3 perovskite composites to replace conventional phosphors in lighting devices.
研究领域:
材料科学
·
光学工程
·
半导体技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Mengyang Shu,Zhijie Zhang,Zhongliang Dong,Jiayue Xu
Converting CO 2 into valuable fossil fuels through artificial photosynthesis is regarded as an appealing approach to address the problems of global warming and energy crisis, which primarily depends on the development of robust and effective photocatalysts . Herein, we illustrate the construction and fabrication of a multiwalled carbon nanotube (MWCNT)/CsPbBr 3 perovskite quantum dots (QDs) nanocomposite with efficient CO 2 photoreduction activity. In this photocatalytic system, the highly conductive MWCNT acts as an electron acceptor to inhibit the carrier recombination in the CsPbBr 3 QDs. When the content of MWCNT was 4.0 wt%, the resultant CsPbBr 3 /MWCNT exhibited the optimum photocatalytic performance, with the yields of CO and CH 4 3.14 and 2.13 times that of pristine CsPbBr 3 QDs, respectively. The rapid electron extraction and transfer from CsPbBr 3 QDs to MWCNT, as well as the enhanced visible light harvesting ability accounted for the remarkable photocatalytic performance. This work is anticipated to provide new pathway for designing efficient perovskite-based photocatalyst in energy conversion applications.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaofeng Lai,Song Wang,Ying Xie,Binghang Liu,Jianhui Sun,Yuxin Li,Haitao Yu,Kai Pan
CsPbBr3 perovskite nanocrystals have emerged as promising candidates for photocatalysis. However, their conversion efficiency is hampered by material instability, and the accumulation of deactivated perovskites produced after photocatalytic reactions raises significant environmental concerns. To address this issue, we developed a mechanochemical grinding approach assisted by oleylamine as an additive to restore the optical properties and photocatalytic activity of deactivated CsPbBr3, which was due to aggregation in the photocatalytic CO2 reduction reaction. Upon regeneration, the CsPbBr3 nanocrystals exhibited an average length of 34.21 nm and an average width of 20.86 nm, demonstrating optical properties comparable to those of the pristine CsPbBr3 nanocrystals. Moreover, they achieved a conversion efficiency of 88.7% compared with pristine CsPbBr3 nanocrystals in the photocatalytic CO2 reduction reaction. This method effectively enhanced the utilization of CsPbBr3, offering a novel approach for the recycling and recovery of perovskite materials and thereby minimizing material waste and environmental pollution.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）