Journal of Materials Chemistry C
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2017
·Vol. 6
·期 1
·57-65
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IF 5.256
Yang Miao,Hanbo Yu,Yuewei Zhang,Xianju Yan,Jingying Zhang,Yue Wang
Two indacenodithiophene (IDT) based water/alcohol-soluble small molecular cathode interlayers (CILs), namely TBIDTD and TBIDTCN, were designed, synthesized and applied in typical PTB7:PC71BM-based conventional structural single-junction polymer solar cells (PSCs). This is the first report where the IDT core was used as a large π-conjugated backbone for CILs. These two molecules adopt the same polar end-groups. However, compared to TBIDTD, TBIDTCN exhibits a lower LUMO (lowest unoccupied molecular orbital) level due to the introduction of dicyanomethylene groups, which is beneficial for electron transport and extraction at the interface. Systematic optimizations were carried out to confirm the interfacial modification ability of the CILs. The results indicate that both CILs can significantly improve the performance of PSCs, and the TBIDTCN-modified devices presented better performance because of the further improved electron mobility and further reduced Rs (series resistance). A PCE (power conversion efficiency) of 9.19% was achieved by the TBIDTCN-modified devices, which was nearly 1.66 times that of the bare cathode device, due to the simultaneously enhanced Voc (circuit voltage), Jsc (short-circuit current) and FF (fill factor). Our work demonstrates that the IDT-based CILs are effective in improving the performance of PSCs and presents an attractive design strategy for CILs with large π-conjugation and electron-deficient properties.
研究领域:
材料科学
·
有机光电子学
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2022
·Vol. 66
·期 1
·185-194
·
IF 10.138
Li Yong,Zhang Qian,Liu Lidan,Wang Dapeng,Liu Zhike,Yuan Ningyi,Ding Jianning,Wang Qiang,Liu Shengzhong (Frank)
The additive strategy has emerged as an effective approach to improving the performance of perovskite solar cells (PSCs). Herein, a small acceptor-donor-acceptor type molecule indaceno[1,2-b:5,6-b′]dithiophene chloride (IDT-Cl) is designed and synthesized to advance both the efficiency and stability of FA 0.85 MA 0.15 PbI 3 PSCs. Within the IDT-Cl molecule, the S-group with high electron density promotes chemical bonding with the lead cations in the perovskite, resulting in enlarged grain size and smoother surface topography of the perovskite absorber. In addition, the undercoordinated lead ions in the perovskite layer may be passivated by the carbonyl group in the 5-chloroindolin-2-one unit, thereby reducing the number of nonradiative recombination centers. Meanwhile, the IDT-Cl adjusts the energy level mismatch between the perovskite and two adjacent carrier transport layers, leading to easy charge collection. By the multifunctional effect of the IDT-Cl molecule, the modified device yields a high power conversion efficiency (PCE) of 24.46%, 8.8% higher than that of the control PSC (22.48%). More importantly, the hydrophobic alkyl side-chain of the IDT-Cl molecule further ensures enhanced humidity stability of the perovskite film and environmental, thermal, and light stabilities of the PSC devices.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xuejiao Tang,Xiujie Peng,Haitao Liao,Xiaoying Zeng,Xiaoying Zhang,Yu Zhu,Chao Weng,Ping Shen
The rational development of the third component is the key to obtaining highly efficient ternary organic solar cells (OSCs). In this contribution, one tetracyanobutadiene-functionalized small molecule, IDT-T-PCN, featuring a noncoplanar molecular backbone, is selected and employed as a third component to construct PM6:Y6:IDT-T-PCN ternary OSCs. Results demonstrate that IDT-T-PCN exhibits complementary absorption and cascade energy-level alignment with the host materials (PM6 and Y6), which are beneficial for improving light-capture capability and charge transfer properties. Absorption spectra and contact angle measurements reveal that there is good compatibility and strong interaction between IDT-T-PCN and Y6, which can affect the crystallization and molecular aggregation of the host materials, especially Y6. The morphology, structure, and formation kinetics characterizations of the active layer film have unveiled that IDT-T-PCN plays a critical role in optimizing phase separation and morphology, modulating molecular aggregation, and enhancing crystallization and orderly molecular stacking of the ternary blend. Therefore, the ternary OSCs exhibit improved charge dissociation and collection probability, enhanced charge transport, and reduced charge recombination, leading to improvements in all photovoltaic parameters. Specially, the ternary OSCs incorporated with IDT-T-PCN achieve a decent PCE of 17.36%, which is obviously higher than that of the host PM6:Y6 binary device (PCE = 15.84%) owing to the simultaneous increase of VOC, JSC, and FF. This work highlights the role of careful material selection and design of the third component with the aim of optimizing device physics processes, crystallinity, and morphology of the blend film, ultimately realizing high-performance ternary OSCs.
研究领域:
材料科学
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有机电子学
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光伏技术
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高分子科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Guoqiang Kuang,Yabing Wang,Mengxiong Zhu,Hongbin Yin,Yijie Tao,Yafei Guo,Shiguo Zhang
The synthesis of high-performance electrochromic polymers remains a key research highlight in the field of electrochromism. Herein, a series of donor-acceptor type conjugated polymers are synthesized based on 4,9-Dihydro-s-indaceno[1,2-b:5,6-b]dithiophene (IDT), 3,4-ethylenedioxythiophene (EDOT), benzo[c][1,2,5]thiadiazole (BTD) and benzothiadiazo-[3,4-g]-quinoxaline (TQX) units by Stille coupling polymerization. By fine-tuning the ratios between the monomers, the synthesized copolymers exhibited diverse color options and tunable properties, by applying an extra potential, polymer films transit from yellow, pink, green, and dark brown to highly transmissive state, along with outstanding electrochromic properties in both the NIR region and the visible region, such as high optical contrast, rapid switching response, and excellent stability. As a result, the derived electrochromic devices demonstrate an optical contrast exceeding 40 % and retained over 74 % of their optical contrast after 1000 switching cycles. These findings collectively demonstrate that these copolymers hold significant potential for applications in smart windows and adaptive camouflage as a versatile color palette.
研究领域:
材料科学
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高分子化学
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电致变色
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有机电子学
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智能材料
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·
IF 5.2
Xiaojian Zhang,Li Yuan,Guozheng Liang,Aijuan Gu
Developing photothermal anti/deicing fluor-free composite coatings with high wear resistance and liquid puncture resistance is an interesting challenge. Herein, a new biomass benzoxazine monomer (C-d) was synthesized, which was then sprayed on a glass slide, followed by spraying hyperbranched polysiloxane (HSi), polydopamine-coated micro AlN (P@mAlN), and polydopamine-coated nano AlN (P@nAlN), successively, to develop a new type of photothermal anti/deicing four-layer fluor-free composite coatings with high wear resistance and liquid puncture resistance (C-d/yHSi/0.4P@2bAlN, y is the mass ratio of HSi to C-d). Three-layer composite coatings (C-d/0.4P@zbAlN, z is the mass ratio of P@mAlN to P@nAlN) and two-layer composite coatings (C-d/xP@mAlN, x is the mass ratio of P@mAlN to C-d) were also prepared to study the influence of compositions on comprehensive properties of coatings. The results show that C-d/0.4P@zbAlN has significantly longer icing delay time (IDT) than C-d and C-d/xP@mAlN coatings but still shows poor wear resistance and liquid puncture resistance. Interestingly, C-d/yHSi/0.4P@2bAlN coatings have good superhydrophobicity; as y increases, both IDT and wear resistance increase significantly. When y = 0.5, the obtained C-d/0.5HSi/0.4P@2bAlN coating has the best integrated performance, including high anti-deicing property (IDT = 627 s), high wear resistance, and liquid puncture resistance as well as good photothermal deicing performance, the ice melts in 343 s under the irradiation with 808 nm infrared light, overcoming the bottleneck of poor wear resistance and liquid puncture resistance of photothermal anti/deicing coatings. Besides, C-d/0.5HSi/0.4P@2bAlN coating can effectively prevent the adhesion of pollutants and remain superhydrophobicity after soaked in different solutions (pH = 1–10). Highlights A new biomass benzoxazine with good flexibility was synthesized. Photo-thermal anti/deicing coatings with micro/nanostructured surfaces are built. The fluor-free coatings have excellent wear resistance and chemical resistance. The mechanism behind was elucidated.
研究领域:
材料科学
·
化学工程
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表面工程
·
涂层技术
✓ 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）