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大同梦 中国梦 阳光路
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作者 刘双溪 《高考》 2018年第11期3-3,共1页
习近平总书记所指出的中国先贤'天下大同'即共同社会理想是我们所追求的终极目标。我们为此而美丽地憧憬着,不辞艰辛地追寻着,执着无悔地践行着。一带一路终将成为新全球化的一个切实行动,将对国际格局和国内发展产生深远影响,... 习近平总书记所指出的中国先贤'天下大同'即共同社会理想是我们所追求的终极目标。我们为此而美丽地憧憬着,不辞艰辛地追寻着,执着无悔地践行着。一带一路终将成为新全球化的一个切实行动,将对国际格局和国内发展产生深远影响,将成为撬动中国崛起一个新的杠杆支点。 展开更多
关键词 大同梦 中国梦 一带一路 阳光路
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SnO_2 nanosheet as a photoanode interfacial layer for dyesensitized solar cells 被引量:1
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作者 蔡锋石 王菁 +1 位作者 袁志好 段月琴 《Optoelectronics Letters》 EI 2011年第5期321-324,共4页
SnO2 nanosheet films about 200 nm in thickness are successfully fabricated on fluorine-doped tin oxide (FTO) glass by a facile solution-grown approach. The prepared SnO2 nanosheet film is appfied as an interfacial l... SnO2 nanosheet films about 200 nm in thickness are successfully fabricated on fluorine-doped tin oxide (FTO) glass by a facile solution-grown approach. The prepared SnO2 nanosheet film is appfied as an interfacial layer between the nanocrystalline TiO2 film and the FTO substrate in dye-sensitized solar cells (DSCs). Experimental results show that the introduction of a SnO2 nanosheet film not only suppresses the electron back-transport reaction at the electrolyte/FTO interface but also provides an efficient electron transition channel along the SnO2 nanosheets, and as a result, increasing the open circuit voltage and short current density, and finally improving the conversion efficiency for the DSCs from 3.89% to 4.62%. 展开更多
关键词 Conversion efficiency Electron transitions FLUORINE Interfaces (materials) NANOCOMPOSITES Open circuit voltage Oxide films Photoelectrochemical cells Solar cells Tin Tin oxides Titanium dioxide
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CsPbBrI perovskites with low energy loss for high-performance indoor and outdoor photovoltaics 被引量:5
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作者 Kai-Li Wang Xiao-Mei Li +2 位作者 Yan-Hui Lou Meng Li Zhao-Kui Wang 《Science Bulletin》 SCIE EI CSCD 2021年第4期347-353,M0004,共8页
Over the years,the efficiency of inorganic perovskite solar cells(PSCs)has increased at an unprecedented pace.However,energy loss in the device has limited a further increase in efficiency and commercialization.In thi... Over the years,the efficiency of inorganic perovskite solar cells(PSCs)has increased at an unprecedented pace.However,energy loss in the device has limited a further increase in efficiency and commercialization.In this work,we used(NH4)2C2O4·H2O to treat CsPbBrI2 perovskite film during spin-coating.The CsPbBrI2 underwent secondary crystallization to form high quality films with micrometer-scale and low trap density.(NH4)2C2O4·H2O treatment promoted charge transfer capacity and reduced the ideal factor.It also dropped the energy loss from 0.80 to 0.64 eV.The resulting device delivered a power conversion efficiency(PCE)of 16.55%with an open-circuit voltage(Voc)of 1.24 V,which are largely improved compared with the reference device which exhibited a PCE of 13.27%and a Voc of 1.10 V.In addition,the optimized treated device presented a record indoor PCE of 28.48%under a fluorescent lamp of 1000 lux,better than that of the reference device(19.05%). 展开更多
关键词 Perovskite solar cells Energy loss Indoor light Carrier dynamics Grain size
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A low-temperature TiO2/SnO2 electron transport layer for high-performance planar perovskite solar cells 被引量:3
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作者 Nan Li Jin Yan +6 位作者 Yuqian Ai Ershuai Jiang Liujin Lin Chunhui Shou Baojie Yan Jiang Sheng Jichun Ye 《Science China Materials》 SCIE EI CSCD 2020年第2期207-215,共9页
Conventional titanium oxide(TiO2) as an electron transport layer(ETL) in hybrid organic-inorganic perovskite solar cells(PSCs) requires a sintering process at a high temperature to crystalize, which is not suitable fo... Conventional titanium oxide(TiO2) as an electron transport layer(ETL) in hybrid organic-inorganic perovskite solar cells(PSCs) requires a sintering process at a high temperature to crystalize, which is not suitable for flexible PSCs and tandem solar cells with their low-temperatureprocessed bottom cell. Here, we introduce a low-temperature solution method to deposit a TiO2/tin oxide(SnO2) bilayer towards an efficient ETL. From the systematic measurements of optical and electronic properties, we demonstrate that the TiO2/SnO2 ETL has an enhanced charge extraction ability and a suppressed carrier recombination at the ETL/perovskite interface, both of which are beneficial to photo-generated carrier separation and transport. As a result, PSCs with TiO2/SnO2 bilayer ETLs present higher photovoltaic performance of the baseline cells compared with their TiO2 and SnO2 single-layer ETL counterparts. The champion PSC has a power conversion efficiency(PCE) of 19.11% with an open-circuit voltage(Voc)of 1.15 V, a short-circuit current density(Jsc) of 22.77 mA cm^-2,and a fill factor(FF) of 72.38%. Additionally, due to the suitable band alignment of the TiO2/SnO2 ETL in the device, a high Vocof 1.18 V is achieved. It has been proven that the TiO2/SnO2 bilayer is a promising alternative ETL for high efficiency PSCs. 展开更多
关键词 perovskite solar cell electron transport layer TiO2/SnO2 low temperature energy band alignment
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Synergistic high efficiency and low energy loss of all-small-molecule organic solar cells based on benzotriazole-basedπ-bridge unit 被引量:2
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作者 Jing Guo Ke Hu +6 位作者 Beibei Qiu Dengchen Yang Xiaojun Li Jinyuan Zhang Lei Meng Zhanjun Zhang Yongfang Li 《Science China Materials》 SCIE EI CAS CSCD 2022年第12期3382-3391,共10页
Reducing energy loss(V_(loss))is one of the most crucial challenges in organic photovoltaic cells.The V_(loss),determined by the differences between the optical band gap(E_(g))of the active layer material and the open... Reducing energy loss(V_(loss))is one of the most crucial challenges in organic photovoltaic cells.The V_(loss),determined by the differences between the optical band gap(E_(g))of the active layer material and the open-circuit voltage(V_(oc))of the device,is generally alleviated by lowering the energy difference between the lowest unoccupied molecular orbital(LUMO)and highest occupied molecular orbital(HOMO)level of the donor(D)and acceptor(A).In this work,we synthesized two A-π-D-π-A-type small-molecule donors(SMDs)SM-benzotriazole(BTz)-1 and SM-BTz-2 by introducing a BTzπ-bridge unit and terminal regulation.The BTzπ-bridge unit significantly lowers the HOMO energy level of SMDs,resulting in high V_(oc)and high mobility,achieving a balance of low energy loss(<0.5 eV)and high efficiency.Ultimately,the organic solar cells based on SM-BTz-2 as the donor and Y6 as the acceptor obtain a high V_(oc)of 0.91 V,J_(sc) of 22.8 mA cm^(−2),fill factor of 68%,and power conversion efficiency(PCE)of 14.12%,which is one of the highest efficiencies based on the SMDs with triazoleπ-bridges to date.What’s more,the BTzπ-bridge unit is a potential unit that can improve mobility and reduce energy loss. 展开更多
关键词 small-molecule donor materials all-small-molecule organic solar cells benzotriazoleπ-bridge energy loss
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Photo-stable perovskite solar cells with reduced interfacial recombination losses using a CeO interlayer
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作者 Xiaoqiang Shi Ye Tao +5 位作者 Zhuoxin Li Huirong Peng Molang Cai Xuepeng Liu Zhongyan Zhang Songyuan Dai 《Science China Materials》 SCIE EI CAS CSCD 2021年第8期1858-1867,共10页
Despite demonstrating remarkable power conversion efficiencies(PCEs), perovskite solar cells(PSCs) have not yet achieved their full potential. In particular, the interfaces between the perovskite and charge transport ... Despite demonstrating remarkable power conversion efficiencies(PCEs), perovskite solar cells(PSCs) have not yet achieved their full potential. In particular, the interfaces between the perovskite and charge transport layers account for the vast majority of the recombination losses.Interfacial contact and band alignment between the lowtemperature-processed TiO_(2) electron transport layer(ETL)and the perovskite are essential to minimize nonradiative recombination losses. In this study, a CeOx interlayer is employed to modify the perovskite/TiO_(2) interface, and the charge transport properties of the devices are investigated. The bilayer-structured TiO_(2)/CeOx ETL leads to the modification of the interface energetics, resulting in improved electron extraction and reduced nonradiative recombination in the PSCs.Devices based on TiO_(2)/CeOx ETL exhibit a high open-circuit voltage(Voc) of 1.13 V and an enhanced PCE of more than 20%as compared with Vocof 1.08 V and a PCE of approximately 18% for TiO^(2-)based devices. Moreover, PSCs based on TiO_(2)/CeOx ETL maintain over 88% of their initial PCEs after light illumination for 300 min, whereas PSCs based on TiO_(2) ETL almost failed. This study provides an efficient strategy to enhance the PCE and stability of PSCs based on a lowtemperature-processed TiO_(2) ETL. 展开更多
关键词 perovskite solar cell interface passivation recombination light stability CeOx
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