Journal of Physical Chemistry C
·
2014
·
IF 4.835
Yawen Chen,Zhanhao Hu,Zhiming Zhong,Wen Shi,Junbiao Peng,Jian Wang,Yong Cao
Ultrathin ZnO layer of ca. four nm thick deposited from an aqueous zinc oxide hydrate (ZnO·xH2O) solution is developed as the electron transport layer (ETL) in the inverted polymer solar cells (PSCs). Because of the low energy metal–ammine dissociation and hydroxide condensation/dehydration chemistry, a conversion temperature (TA) as low as 80 °C is achieved. With the active layer of poly(N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-3′,2′,1′-benzothiadiazole)) doped with [6,6]-phenyl C71 butyric acid methyl ester (PCDTBT:PC71BM), the average power conversion efficiency of the devices is up to 6.48%, and the short circuit current density reaches 11.4 mA cm–2. In comparison, the devices with traditional sol–gel processed ZnO electron transport layer has a power conversion efficiency of 5.53% at an annealing temperature of 200 °C. The device performance improvement is attributed to the better charge transportation and smoother surface of the ZnO film deposited from ZnO·xH2O aqueous solution. The simple solution preparation and the facile device fabrication, combined with the low conversion temperature make the aqueous ZnO·xH2O one of the best candidates for ETL in the inverted PSCs fabricated on low cost, flexible substrates.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 7
·5789-5793
·
IF 2.22
Zhai Zhichun,Xu Meifeng
Copper phthalocyanine (CuPc) and zinc phthalocyanine (ZnPc) were both widely used in small-molecule solar cells which were considered as promising materials for photovoltaic technology. However, all-solution-processed CuPc (ZnPc)-based devices are not be fully studied. The low solubility of CuPc and ZnPc causes a bad morphology of CuPc (ZnPc)/C60 films, which leads to an unsatisfactory power conversion efficiency (PCE). In this work, in order to prepare continuous CuPc (ZnPc)/C60 composite films by solution processing, C60 film was transferred onto the CuPc (ZnPc) surface to form CuPc (ZnPc)/C60 films by stripping-transfer method. Scanning electron microscopic (SEM) images of the prepared CuPc/C60 and ZnPc/C60 composite films show both continuous films were formed because of stripping-transfer method. The performance of the small-molecule solar cells prepared by stripping-transfer method was better than devices prepared by the traditional evaporation method with a device structure of ITO/CuPc (ZnPc)/C60/Carbon paste. Due to the strong optical absorption of ZnPc, the efficiency of small-molecule solar cells using ZnPc is higher than devices using CuPc, and the efficiency could reach 1.37%. What is more, other composite films can also be formed by this low cost and convenient method, which is suitable for commercialized solar cells.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 39
·15072-15080
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IF 8.262
Yuwan Yang,Bien Tan,Colin D. Wood
The preparation of soluble microporous polymers for large-scale gas storage and separation with low cost, scalability and synthetic diversification is extremely challenging. Here, we report the synthesis of solution-processable hypercrosslinked polymers (SHCPs) by folding polystyrene molecules at high dilution. A low cost knitting method is employed and by slowly adding an external crosslinker, intramolecular cross-links were introduced. Despite being highly cross-linked, the resulting hypercrosslinked polymers dissolve in a range of organic solvents to form thermodynamically stable homogenous liquids. By increasing the concentration of polystyrene and the amount of crosslinker, the BET surface area of SHCPs increased with the largest surface area of 724 m2 g−1. Moreover, they also show comparable gas uptake properties reaching 8.11 wt% CO2 adsorption (1.13 bar and 273 K), 1.01 wt% H2 adsorption (1.13 bar and 77 K), and 0.14 wt% CH4 adsorption (1.13 bar and 273 K). The reaction offers a route to new classes of solution-processable microporous polymers as promising materials for gas storage and separation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-7
·
IF 11.878
Chen Chao,Gao Liang,Gao Wanru,Ge Cong,Du Xinyuan,Li Zha,Yang Ying,Niu Guangda,Tang Jiang
Circularly polarized light (CPL) detection is required in various fields such as drug screening, security surveillance and quantum optics. Conventionally, CPL photodetector needs the installation of optical elements, imposing difficulties for integrated and flexible devices. The established CPL detectors without optical elements rely on chiral organic semiconductor and metal metamaterials, but they suffer from extremely low responsivity. Organic-inorganic hybrid materials combine CPL-sensitive absorption induced by chiral organics and efficient charge transport of inorganic frameworks, providing an option for direct CPL detection. Here we report the CPL detector using chiral organic-inorganic hybrid perovskites, and obtain a device with responsivity of 797 mA W -1 , detectivity of 7.1 × 10 11 Jones, 3-dB frequency of 150 Hz and one-month stability, a competitive combined feature for circularly polarized light detection. Thanks to the solution processing, we further demonstrate flexible devices on polyethylene terephthalate substrate with comparable performance.
研究领域:
光电技术
·
材料科学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yiling Wang,Qun Luo,Na Wu,Qiankun Wang,Hongfei Zhu,Liwei Chen,Yan-Qing Li,Liqiang Luo,Chang-Qi Ma
Solution-processed organic–inorganic hybrids composing of MoO3 nanoparticles and PEDOT:PSS were developed for use in inverted organic solar cells as hole transporting layer (HTL). The hybrid MoO3:PEDOT:PSS inks were prepared by simply mixing PEDOT:PSS aqueous and MoO3 ethanol suspension together. A core–shell structure was proposed in the MoO3:PEDOT:PSS hybrid ink, where PEDOT chains act as the core and MoO3 nanoparticles connected with PSS chains act as the composite shell. The mixing with PEDOT:PSS suppressed the aggregation of MoO3 nanoparticles, which led to a smoother surface. In addition, since the hydrophilic PSS chains were passivated through preferentially connection with MoO3, the stronger adhesion between MoO3 nanoparticles and the photoactive layer improved the film forming ability of the MoO3:PEDOT:PSS hybrid ink. The MoO3:PEDOT:PSS hybrid HTL can therefore be feasibly deposited onto the hydrophobic photoactive polymer layer without any surface treatment. The use of the MoO3:PEDOT:PSS hybrid HTL resulted in the optimized P3HT:PC61BM- and PTB7:PC61BM-based inverted organic solar cells reaching highest power conversion efficiencies of 3.29% and 5.92%, respectively, which were comparable with that of the control devices using thermally evaporated MoO3 HTL (3.05% and 6.01%, respectively). Furthermore, less HTL thickness dependence of device performance was found for the hybrid HTL-based devices, which makes it more compatible with roll-to-roll printing process. In the end, influence of the blend ratio of MoO3 to PEDOT:PSS on photovoltaic performance and device stability was studied carefully, results indicated that the device performance would decrease with the increase of MoO3 blended ratio, whereas the long-term stability was improved.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2014
·
IF 3.468
Xia Kong,Qi Jia,Fanghua Wu,Yanli Chen
A new sandwich-type bis(phthalocyaninato) europium complex [Pc(OAr) 8 ]Eu[Pc(OAr) 8 ] [Pc(OAr) 8 = 2,3,9,10,16,17,23,24-octanaphthoxy phthalocyanine], was synthesized and fabricated into organic field-effect transistors devices on a flexible plastic substrate by using a simple solution-based quasi–Langmuir–Shäfer method. Ambipolar transport has been obtained in [Pc(OAr) 8 ]Eu[Pc(OAr) 8 ]-based thin film transistors with the carrier mobilities to 0.10 cm 2 V −1 s −1 for holes and 0.01 cm 2 V −1 s −1 for electrons, respectively. The energy levels of the highest occupied molecular orbital (−4.63 eV) and the lowest unoccupied molecular orbital (−3.41 eV) were obtained based on electrochemical studies of this double-decker complex. These values just simultaneously meet the energy levels required for p -type and n -type natures of organic semiconductors , suggesting the ambipolar organic semiconducting nature of this double-decker complex. Organized film microstructures and J -type molecular stacking mode for the double-decker complex in the quasi–Langmuir–Shäfer film are revealed. This study constitutes the first attempt to fabricate low-cost, flexible ambipolar phthalocyanine-based organic field-effect transistors by using simple solution-processing methods.
研究领域:
有机电子学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2024
·
IF 6
Chenxi Zhao,Bowen Liu,Fuyan Chen,Jiaxin Gao,Xinan Shi,Daocheng Pan
Cu(In, Ga)(S, Se) 2 (CIGSSe) solar cell is one of the most promising thin-film solar cells with a record power conversion efficiency (PCE) of 23.6%. Conventional CIGSSe thin-film solar cells are usually fabricated on Mo-coated soda-lime glass substrate, thereby, the sunlight on the rear side cannot be utilized by the monofacial CIGSSe solar cells owing to the opacity of the Mo electrode. CIGSSe solar cells fabricated on transparent conductive oxide (TCO) electrode enable to fabricate bifacial solar cells, which can generate power on both sides of solar cells, so that bifacial solar cells have a high potential application in building-integrated photovoltaics. However, the PCEs of CIGSSe solar cells fabricated on TCO substrates are significantly lower than those of ones on Mo substrates. In this article, bifacial CIGSSe solar cells on fluorine-doped tin oxide (FTO) substrate are fabricated by using an ionic liquid-assisted solution approach and utilizing a MoO 3 thin film as an interface layer between FTO and CIGSSe absorber layer, yielding a front-side PCE of 9.73% and a back-side PCE of 1.77%.
研究领域:
材料科学
·
光伏技术
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2018
·Vol. 30
·期 31
·1801021
·
IF 21.95
Xiangling Tian,Hongyu Luo,Rongfei Wei,Chunhui Zhu,Qianyi Guo,Dandan Yang,Fengqiu Wang,Jianfeng Li,Jianrong Qiu
Pulsed lasers operating in the mid-infrared (3–25 µm) are increasingly becoming the light source of choice for a wide range of industrial and scientific applications such as spectroscopy, biomedical research, sensing, imaging, and communication. Up to now, one of the factors limiting the mid-infrared pulsed lasers is the lack of optical switch with a capability of pulse generation, especially for those with wideband response. Here, a semiconductor material of bismuth oxyselenide (Bi 2 O 2 Se) with a facile processibility, constituting an ultrabroadband saturable absorber for the mid-infrared (actually from the near-infrared to mid-infrared: 0.8–5.0 µm) is exhibited. Significantly, it is found that the optical response is associated with a strong nonlinear character, showing picosecond response time and response amplitude up to ≈330.1% at 5.0 µm. Combined with facile processibility and low cost, these solution-processed Bi 2 O 2 Se materials may offer a scalable and printable mid-infrared optical switch to open up the long-sought parameter space which is crucial for the exploitation of compact and high-performance mid-infrared pulsed laser sources.
研究领域:
光学
·
光子学
·
材料科学
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半导体物理
·
激光技术
✓ 已验证
DOI
高影响因子
Journal of Physics Communications
·
2018
·Vol. 2
·期 7
·075018
·
IF 0
Mehran Habibi,Morteza Eslamian
Low-temperature solution-processed polymer and perovskite thin film field effect transistors (FETs) are attractive, as they are compatible with flexible and printed electronics. Given that chemical treatment of the FET channel is expensive and tedious, and sometimes damages the underneath (dielectric) solution-processed layers, in this work, two facile and scalable mechanical treatment techniques are proposed. In the case of polymer FET, the wet spun film was excited by ultrasonic vibration imposed on the substrate. It is demonstrated that the micromixing effect induced by the ultrasonic radiation results in disentanglement, reorganization, and recrystallization of the polymer chains in the wet film. Ultrasonic vibration also improves the film leveling and uniformity and enhances the charge mobility of the channel of the polymer FET. In the case of the perovskite FET, we found that nitrogen blowing over the spun sample of the perovskite solution is a facile, yet effective substitution for the conventional anti-solvent treatment, commonly used to control the solvent evaporation rate. By nitrogen blowing, we achieved a uniform film of perovskite deposited on a solution-processed dielectric layer with domain sizes up to several hundreds of nanometers. By applying these techniques, the linear charge mobility of 0.041 cm2 Vs−1 and 0.055 cm2 Vs−1 were obtained for polymer and perovskite FETs under illumination, respectively. It is shown that while the performance of the polymer FET is only slightly sensitive to illumination, the perovskite FET performs well only under illumination.
研究领域:
材料科学
·
电气工程
·
纳米技术
✓ 已验证
DOI
ACS Applied Energy Materials
·
2024
·
IF 5.4
Boyang Han,Yongfeng Li,Rensheng Wang,Wenjie Zhu,Zhenyan He,Huanhuan Sun,Xiuqing Meng,Shihua Huang,Yanping Song,Jiayong Zhang,Bin Yao
Suppressing the CuZn antisite defects and band tailing states is paramount for Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. To this end, cation doping has been widely adopted and investigated. Nevertheless, to the best of our knowledge, there is a scarcity of reports specifically addressing the doping of group IIIA elements to date. Herein, we present a viable strategy, incorporating the Al element, to achieve superior absorber quality and device performance. The addition of Al-doping not only improves the selenization degree but also enhances surface smoothness and induces a more Cu-deficient CZTSSe surface, thereby elevating both the quality of the absorber and heterojunction interface. Furthermore, we observe that the CuZn defect can be effectively mitigated through the substitution of Al dopants at the Zn site, consequently resulting in a reduction of band tailing states. Consequently, it significantly improves the efficiency from 6.24 to 9.25% with a low open-circuit voltage deficit of ∼0.291 V relative to the doping-free case, one of the highest values for the type of IIIA element doping cells. Our results demonstrate that Al incorporation is also a feasible pathway to suppress the antisite defects and band tailing states in solution-processed CZTSSe, thereby facilitating the realization of efficient kesterite solar cells.
研究领域:
材料科学
·
可再生能源
·
太阳能电池技术
·
半导体物理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 81
·77701-77708
·
IF 3.289
Yaxiong Guo,Hongwei Lei,Borui Li,Zhao Chen,Jian Wen,Guang Yang,Guojia Fang
We successfully constructed a heterojunction structure composed of Ag2S nanocrystals/P3HT conjugated polymer with a relatively high absorption coefficient and broader absorption from the ultraviolet to near-infrared region. The assembled P3HT:Ag2S devices exhibited outstanding short-circuit current density around 19 mA cm−2. Meanwhile, we demonstrated that a low-temperature solution-processed nanocrystalline SnO2 thin film prepared by a facile synthesis method can be an excellent electron transport layer (ETL) material for hybrid solar cells. The SnO2 based hybrid solar cells exhibit an open circuit voltage of 280 mV, which was 100 mV higher than those for devices without SnO2. Based on the above work, we hypothesized that the higher power conversion efficiency is due to the excellent properties of nanocrystalline SnO2 films, such as high electron mobility and excellent transparency at visible wavelength and enhanced exciton dissociation efficiency, and better energy level alignment between FTO and Ag2S for greater photovoltage retention. The simple low temperature low energy consumption, and low-cost soft-chemical process is compatible with the roll-to-roll manufacturing of low-cost hybrid solar cells on flexible substrates.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
有机电子学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2019
·Vol. 27
·期 6
·7935-7944
·
IF 3.561
Yanbin Zhang,Fengjuan Zhang,Hongzhe Wang,Lei Wang,Fangfang Wang,Qingli Lin,Huaibin Shen,Lin Song Li
In this paper, we report the synthesis, the structural and optical characterization of CdSe/CdS//CdS nanorods (NRs) and their exploitation in nanorod-based light-emitting diodes (NR-LEDs). Two kinds of NRs of CdSe/CdS and CdSe/CdS//CdS were incorporated into the structure of solution-processed hybrid NR-LEDs. Compared to CdSe/CdS, the efficiencies of CdSe/CdS//CdS NR-based LEDs are overwhelmingly higher, specifically showing unprecedented values of peak current efficiency of 19.8 cd/A and external quantum efficiency of 15.7%. Such excellent results are likely attributable to a unique structure in CdSe/CdS//CdS NRs with a relatively high quantum yield, thick CdS outer shell, and rod structure which minimize nonradiative energy transfer between closely packed NRs in emitting layer.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 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）