Advanced Optical Materials
·
2022
·Vol. 10
·期 21
·2201053
·
IF 10.05
Xiao-Kai Gong,Lan Li,Jian-Ping Xu,Ru-Kun Ding,Zhao-Wei Zhang,Qian Li,Long Liu,Xiao-Song Zhang
Lead-free halide double perovskites continue to draw increasing attention in view of their nontoxicity and stability compared to lead-based perovskites. High-end full-color displays and white light illumination are based on blue-light excitation. However, the excitation of blue light of lead-free halide double perovskites Cs 2 AgInCl 6 at room temperature faces a great challenge, which is crucial to its commercial application. In this study, Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 / x KBr(KI), which can be excited under blue light, have been synthesized by solid-phase compression method. Under blue-light excitation, Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 /16KBr and Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 /16KI emit 605 nm orange light and 665 nm red light, respectively. Based on that, orange and red light-emitting devices are fabricated excited by blue light. The performance of blue-light excitation can not only make the double perovskites widely used in light-emitting devices, but also as a light-emitting down-shift layer in photovoltaic devices to improve the performance of photovoltaic modules. With the Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 /16KBr, the power conversion efficiency of the Si solar cell increases 4.80% and 8.14% under the sunlight and white light-emitting devices, respectively. The blue-light excitation of lead-free double perovskites at room temperature offers greater development potential in the field of display devices and optoelectronics.
研究领域:
材料科学
·
光学工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2025
·
IF 6.6
Wuzhi Yuan,Huaming Li,Jiechao Chen,Ya Ge,Liehui Xiao,Si-Min Huang
Solar energy offers a promising and sustainable alternative to traditional energy. However, surface soiling can reduce the efficiency of PV panels dramatically. In this paper, we investigate the continuous droplets impacting on dusty surfaces to achieve surface cleaning. The effects of surface wettability, dust types, water volume, and surfactants on the dynamic behavior and macroscopic efficacy of droplet dust removal are analyzed. For distilled water, the superhydrophilic surface achieves the best dust removal with transmittance recovering to 96 % of a clean surface, while the hydrophilic surface is worst. Notable water channels are observed on the hydrophilic surface, which results in a significant contrast in surface transmittance between the interior and exterior of these channels, 90 % and 73 %, respectively. The overall dust-removal performance on the surface is rather poor, and a large amount of water resources are wasted. Interestingly, surfactants solution can disrupt the water channels on the hydrophilic surface relying on sequential sliding and bouncing, thus enhancing the dust removal efficiency. It is found that anionic surfactant (AS) solution demonstrates the optimal performance. The relative dust removal mass is just 48 % using 5 ml water, while it increases to 84 % for AS0.5. This is attributed to the repulsive forces between the negatively charged dust and molecules of anionic surfactant. This finding helps to the self-cleaning applications of water droplet impacting for PV modules.
研究领域:
能源科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 17
·4984-4992
·
IF 5.368
Zhenguo Wang,Jie Zhao,Ying Li,Qiang Peng
A low band-gap copolymer, PDTS-FID, containing alternating dithienosilole (DTS) donor blocks and fluorinated isoindigo (FID) units, and its non-fluorinated counterpart, PDTS-ID, have been synthesized and characterized for photovoltaic applications. Compared to PDTS-ID, its fluorinated counterpart, PDTS-FID, exhibits broader and stronger absorption, lower-lying HOMO and LUMO energy levels, and higher hole mobility, resulting in an improved open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF) and power conversion efficiency (PCE). The positive effects were attributed to the fluorinated isoindigo block which favored a linear and planar conformation, giving rise to better backbone packing of the related copolymer, which was also confirmed by theoretical calculations (DFT). The conventional and inverted devices were fabricated and evaluated to explore the photovoltaic properties of the resulting copolymers. The best performance of 5.79% PCE was obtained from an inverted polymer solar cell (PSC) using PDTS-FID as the donor material, with a Voc of 0.84 V, a Jsc of 10.77 mA cm−2 and a FF of 0.64. These low band-gap copolymers could be expected to be promising donor materials for application in PSCs.
研究领域:
材料科学
·
有机光电材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhuoneng Bi,Xueqing Xu,Xia Chen,Yanqing Zhu,Chang Liu,Hua Yu,Yupeng Zheng,Pavel A. Troshin,Antonio Guerrero,Gang Xu
Emerging hybrid organic–inorganic perovskites with superior optoelectronic property demonstrate promising prospect for photovoltaic (PV) applications, in particular for low-lighting indoor applications e.g. within internet of things (IoT) networks or low-energy wireless communication devices. In order to prepare devices with high power output under low-illumination conditions, scalable fabrication techniques are preferred for large-area perovskite solar cells. In additions, one of the key parameters to achieve high-efficiency large-area perovskite solar cells is to minimize the ohmic loss to further boost the solar cell efficiency. Herein, a one-step blade-coating method assisted by hexafluorobenzene (HFB) was developed to deposit dense, large-area smooth and high-quality perovskite films with low ohmic loss. The as-fabricated devices demonstrated power conversion efficiency (PCE) of 20.7% (area of 0.2 cm 2 ) and 16.5% (1 cm 2 ), respectively, under standard (AM 1.5G) illumination conditions. Besides, the large-area (1 cm 2 ) devices demonstrated a remarkable PCE of ∼ 33.8% and ∼ 30.0% under 1000 lx and 100 lx illumination provided by white light-emitting diode (LED) lamp, respectively. We exhibited a series-connected stack of large-area (totally active area ∼ 4 cm 2 ) perovskite photovoltaic device powering up a LED under common indoor environment as an indoor self-power indicator lamp. The analysis using a single diode model suggests that the high performance of the large-area devices under low-lighting indoor conditions is highly associated with the largely reduced ohmic losses, which particularly indicate that the perovskite films by a facile and scalable blade-coating method. The presented scalable approach paves the way to designing high-performance perovskite solar cells for a variety of emerging indoor PV applications.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-8
·
IF 4.703
Lv Chunzheng,He Lirong,Tang Jiahong,Yang Feng,Zhang Chuhong
As an important photoconductive hybrid material, perylene/ZnO has attracted tremendous attention for photovoltaic-related applications, but generally faces a great challenge to design molecular level dispersed perylenes/ZnO nanohybrids due to easy phase separation between perylenes and ZnO nanocrystals. In this work, we reported an in-situ reaction method to prepare molecular level dispersed H-aggregates of perylene bisimide/ZnO nanorod hybrids. Surface photovoltage and electric field-induced surface photovoltage spectrum show that the photovoltage intensities of nanorod hybrids increased dramatically for 100 times compared with that of pristine perylene bisimide. The enhancement of photovoltage intensities resulting from two aspects: (1) the photo-generated electrons transfer from perylene bisimide to ZnO nanorod due to the electric field formed on the interface of perylene bisimide/ZnO; (2) the H-aggregates of perylene bisimide in ZnO nanorod composites, which is beneficial for photo-generated charge separation and transportation. The introduction of ordered self-assembly thiol-functionalized perylene-3,4,9,10-tetracarboxylic diimide (T-PTCDI)/ ZnO nanorod composites induces a significant improvement in incident photo-to-electron conversion efficiency. This work provides a novel mentality to boost photo-induced charge transfer efficiency, which brings new inspiration for the preparation of the highly efficient solar cell.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Huanxin Peng,Ping Fan,Zhuanghao Zheng,Shuo Chen,Guangxing Liang
Environmentally friendly lead-free Cs2AgBiBr6 double perovskites have emerged as potential materials for photovoltaic applications owing to their nontoxicity and high stability. However, the low solubility of precursors in the solution method and the deviated composition in the reported sequential evaporation process are still the challenges to obtain highly pure Cs2AgBiBr6 phase films. In this work, we proposed a single-source vapor deposition process for high-quality Cs2AgBiBr6 films with an effective thermally induced phase-controlled strategy. The microstructure, composition, and photoelectric properties of Cs2AgBiBr6 films with different heat treatments were investigated, and the phase evolution of Cs2AgBiBr6 film formation was figured out. High-phase purity, uniformity, smoothness of the surface, well-defined grain structure, and desired composition stoichiometry of Cs2AgBiBr6 films led to an optimized power conversion of 1.38% for a planar device structure with excellent stability. Our results demonstrate the feasibility of employing a single-source vapor deposition technique to fabricate high-quality double perovskite thin films, which paves the way for further development of various optoelectronic devices based on these promising lead-free semiconductors.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
纳米技术
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2013
·
IF 2.109
Lu Xiao,Jun Yuan,Yingping Zou,Bo Liu,Jinzhi Jiang,Yan Wang,Lihui Jiang,Yong fang Li
A new donor–acceptor conjugated polymer (PBDTPO-FBT), which consists of a fluorinated benzothiadiazole (FBT) electron-acceptor unit and an electron-donor segment of alkoxylphenyl substituted benzo[1,2-b:4,5-b′]dithiophene (BDTPO), was synthesized according to the Stille cross-coupling reaction. The resulting copolymer was characterized by TGA , GPC , UV–vis absorption spectroscopy and cyclic voltammetry measurements. PBDTPO-FBT possesses good thermal stability with 5% weight loss temperature of 410 °C and shows broad absorption at 300–800 nm with an optical bandgap of 1.53 eV. Cyclic voltammetry measurement exhibits HOMO and LUMO energy levels of −5.43 eV and −3.72 eV, respectively. The hole mobility of PBDTPO-FBT:PC 71 BM (1:1, w/w) reaches up to 3.8 × 10 −3 cm 2 /V/s by the space-charge-limited current (SCLC) method. By using 3% 1,8-diiodooctane (DIO) as the solvent additive, the polymer solar cell with the configuration of ITO/PEDOT:PSS/PBDTPO-FBT:PC 71 BM (1:1, w/w)/Ca/Al demonstrates a power conversion efficiency of 2.70% with V oc = 0.70 V, J sc = 7.23 mA/cm 2 and FF = 47.08%, under the illumination of AM 1.5 G, 100 mW/cm 2 .
研究领域:
高分子化学
·
材料科学
·
有机电子学
·
太阳能电池
·
光电转换
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2016
·Vol. 35
·期 2
·249-260
·
IF 1.811
Xu Xiao-peng,Zhang Guang-jun,Zhao Yun-zhe,Liu Jiang,Li Ying,Peng Qiang
A series of copolymers, based on benzo[1,2-b:4,5-b′]dithiophene (BDT) as the electron donor and 2,1,3-benzothiadiazole (BT)/diketopyrrolo[3,4-c]pyrrole (DPP) as the electron acceptors, were synthesized for highly efficient polymer solar cells. By changing the BT/DPP ratio in the conjugated backbone, the absorption, energy levels, molecular aggregation and carrier mobility could be finely tuned. With increased DPP content, the absorption range was extended to the longer wavelength region with narrower bandgaps. The highest occupied molecular orbital (HOMO) levels were also raised up and the molecular aggregation was enhanced. The balance of these factors would afford a remarkable device performance enhancement. Polymer P3 with BT:DPP = 0.7:0.3 (molar ratio) exhibited the highest power conversion efficiency (PCE) of 9.01%, with open circuit voltage ( V
oc = 0.73 V, short current density ( J
sc = 18.45 mA·cm −2 , and fill factor (FF) = 66.9%. The PCE value was improved by 48.7% compared to P1 and by 117.6% compared to P7, respectively, indicating a great potential in photovoltaic application.
研究领域:
高分子科学
·
光伏技术
·
材料科学
·
有机电子学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 36
·6860-6866
·
IF 3.849
Hui Liu,Jiaxin Zhang,Xuerong Zheng,Gang Liu,Huilin Hu,Wenli Pan,Caichi Liu,Qiuyan Hao,Hongjian Chen
A mixed solvent of monoethanolamine and thioglycolic acid is successfully used to dissolve Se powder to prepare a highly reactive and soluble Se solution at room temperature in air. The as-prepared Se solution is very stable for more than half a year without any observed precipitation even in air. We used the Se precursor solution to synthesize various metal selenide nanomaterials such as Sb2Se3 nanorods, CuSe nanoplates and CuInSe2 nanocrystals by using a facile and environmentally-friendly triethylene glycol process. The structure, morphology, chemical composition and optical properties of the synthesized metal selenide nanomaterials are characterized. Moreover, the CuInSe2 nanocrystals are used to prepare ethanol-based colloidal ink and then deposited thin films by a dip-coating process. The synthesized CuInSe2 nanocrystal thin films are annealed at 550 °C in a selenizing atmosphere. A power conversion efficiency of 2.65% has been achieved by using the CuInSe2 thin films after selenization as a light-absorbing layer under AM 1.5 illumination.
研究领域:
材料科学
·
纳米技术
·
光伏应用
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）