ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 19
·2313833
·
IF 18.5
Andrew Balilonda,Mengyu Du,Ziqi Li,Wenbo Li,Wen Mei,Man Yui Leung,Guan Wu,Xiaoming Tao,Wei Chen
Perovskite based on Sn have attracted extensive attention to address the toxicity challenge associated with Pb-based perovskite solar cells. However, Sn-based perovskite solar cells（SPSCs）are notable for their poor stability and loss of efficiency due to rapid oxidation of Sn 2+ to Sn 4+ in air. To slow down the rapid oxidation, a number of antioxidants are suggested. Nevertheless, the antioxidant normally gets oxidized to non-antioxidizing by-products in a single-stage redox reaction and loses the function of oxidation prevention. Herein, vanillin is introduced, a natural antioxidant with a double-staged redox reaction to inhibit the oxidation of Sn 2+ or reduce Sn 4+ back to Sn 2+ , which improves the efficiency and prolongs the open-air stability of SPSCs. With 7.5% vanillin doping, an outstanding efficiency of 13.18% is achieved. Moreover, exposure of the solar cell to 160 W microwave irradiation for 3 minutes resulted in significant efficiency recovery from 88% to 96.5% at 812 hours and from 35.7% to 65.4% after 2200 hours of aging. This work reveals the potential of natural antioxidation and short microwave irradiation as suitable approaches to elevate the efficiency and lifetime of SPSCs.
研究领域:
光伏学
·
材料科学
·
可再生能源
·
纳米技术
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-15
·
IF 36.3
Zheng Haiying,Liu Guozhen,Dong Xinhe,Chen Feifan,Wang Chao,Yu Hongbo,Zhang Zhihua,Pan Xu
Interface modification has been demonstrated as an effective means to enhance the performance of perovskite solar cells. However, the effect depends on the anchoring mode and strength of the interfacial molecules, which determines whether long-term robust interface for carrier viaduct can be achieved under operational light illumination. Herein, we select squaric acid (SA) as the interfacial molecule between the perovskite and SnO 2 layer and propose a self-regulated bilateral anchoring strategy. The unique four-membered ring conjugated structure and dicarboxylic acid groups facilitate stable hydrogen bonds and coordination bonds at both SnO 2 /SA and SA/PbI 2 interfaces. The self-transforming property of SA enables the dynamic bilateral anchoring at the buried interface, ultimately releasing residual stress and constructing a stable interfacial molecular bridge. The results show that SA molecular bridge not only can effectively inhibit the generation of diverse charged defects but also serves as an effective electron transport pathway, resulting in improved power conversion efficiency (PCE) from 23.19 to 25.50% and excellent stability at the maximum power point. Additionally, the PCEs of the flexible and large-area (1 cm 2 ) devices were increased to 24.92% and 24.01%, respectively, demonstrating the universal applicability of the bilateral anchoring to PSCs based on different substrates and larger area.
研究领域:
材料科学
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能源技术
·
纳米技术
·
物理化学
·
应用物理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·781-786
·
IF 0.605
Gao Peng,Chen Lilin,Wu Bo,Zhang Qiming,Xue Chao,Hou Chengyi,Sun Qiang
An optimal structure design of the lattice mismatched GaInP/GaInAs/Ge solar cell with high photoelectric conversion efficiency was proposed. Two-dimensional Bi 2 Te 3 and Sb 2 Te 3 nanosheets were prepared by solvothermal synthesis method used as thermoelectric (TE) functional materials, which is further hybrid with high conductive reduced graphene oxide (rGO) and carbon nanotubes (CNTs). TE film was then fabricated based on above materials. The power factor of the n -type TE film is 19.31 μW/mK 2 , and the power factor of the p -type TE film is 97.40 μW /mK 2 . The flexible TE device was integrated with flexible solar cell. Compared with the single photovoltaic (PV) cell, the efficiency of the as-prepared flexible integrated device measured under the AM1.5 illumination is significantly improved. The efficiency of the two parallel tests is increased from 27.26% and 26.59%, to 29.11% and 28.92%, respectively. The increasing ratio reaches 6.7%–8.8%.
研究领域:
可再生能源
·
材料科学
·
热电技术
·
光伏技术
·
纳米科技
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hong Chen,Jindong Huang,Chao Zhang,Peng Gao,Hongchang Huang,Junlan Li,Juncheng Liu
A foldable polyimide (PI) protective layer with high transmittance and high ultraviolet (UV) resistance is crucial for the practical application of flexible solar cells. Herein, the commercially 2,2′-Bis(trifluoromethyl) benzidine (TFMB) and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) as the monomers, and five ionic liquids (ILs) as the regulators were used to synthesize PI/IL films (PI/IL1, PI/IL2, PI/IL3, and PI/IL4). The outcomes reveal that the average transmittance ( AT ) of PI/IL1 (50 μm thickness) outperforms others, which can be attributed to the expanded π-π stacking distance between PI molecules and the intermolecular multipoint interaction between IL1 and PI. The AT and the elongation at break ( ε ) of PI/IL1 increase sequentially with the 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C 2 mim][NTf 2 ])/TFMB mole ratio, and those of PI/IL1-3 reach the maximum values of 94.23 % and 49.42 % at a 3:1 ratio, respectively. However, the tensile strength ( σ ) of the PI/IL1 film is inferior to that of the pure PI film, and consistently decreases with the increase of [C 2 mim][NTf 2 ]/TFMB mole ratio. Nevertheless, the UV-induced degradation of PI can be delayed through the [C 2 mim][NTf 2 ] regulation. The attenuations of AT , σ and ε of PI/IL1-3 films after 1000 equivalent solar hours (ESHs) UV irradiation are 0.85 %, 14.63 % and 2.99 %, respectively, which are significantly lower than those of pure PI films (2.23 %, 32 % and 23 %). This is attributed to the interaction between the positive and negative charges from [C 2 mim][NTf 2 ] and those from the PI chain breaking. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of PI/IL1-3 are calculated with the density functional theory to reveal the charge transfer between [C 2 mim][NTf 2 ] and PI.
研究领域:
材料科学
·
高分子化学
·
光电
✓ 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）