Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 19
·9797-9805
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IF 11.301
Junhui Tang,Ruisi Chen,Lidong Chen,Guillermo C. Bazan,Ziqi Liang
n-Type semiconducting polymers bearing high Seebeck coefficients (S) have been seldom employed in organic–inorganic thermoelectric nanocomposites (TENCs). Herein we illustrate how to exploit an n-type semiconducting polymer to fabricate TENCs comprising N2200 and metallic Co NWs, in which N2200 contributes significantly to the S of the TENCs. The TENCs exhibit a highest power factor (PF) of 288 μW m−1 K−2 at 80 wt% Co NWs. At a greater Co NW content, the organic/inorganic inter-connectivity deteriorates, owing to the rigid molecular chains of N2200, retarding the increase of electrical conductivity (σ) and also undermining the mechanical flexibility. Flexible n-type doped SWCNTs were therefore added to introduce additional conductive paths. At an optimal amount of SWCNTs (2 wt%), the σ increases to 1860 S cm−1, whereas S remains at approximately −45 μV K−1 and the bendability is improved. The maximal PF and zT values of the resulting ternary TENC reach 483 μW m−1 K−2 and 0.18 at 380 K, respectively. By pairing with p-type PEDOT:PSS/SWCNT thin films, the 6-legged flexible TEG yields maximum output voltage and power of 9.80 mV and 3.72 μW, respectively, when ΔT = 50 K. This work manifests a new avenue to both highly efficient and bendable thermoelectric materials through the judicious choice of multiple blend components.
研究领域:
材料科学
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能源技术
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Caixia Ren,Yue He,Shiqi Li,Qinjun Sun,Yifan Liu,Yukun Wu,Yanxia Cui,Zhanfeng Li,Hua Wang,Yuying Hao,Yucheng Wu
Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted tremendous attention recently because of their excellent photovoltaic performance . High power conversion efficiency (PCE) and long-term stability of PSCs mainly rely on high crystalline quality of perovskite film, good interface contact between functional layers and matching energy level alignment, which can be achieved by crystal growth regulation and interface engineering. Here, we demonstrate a high-performance planar heterojunction PSCs with PCBM/N2200 as double electron transport layers (ETLs). The N2200-based PSCs exhibit an average PCE of 15.50%, which obviously surpass the average PCE of 14.18% of conventional PSCs with only PCBM as ETLs. In comparison with the conventional PSCs, the PCBM/N2200 double ETLs increase built-in potential of devices and decrease interfacial energy barrier of MAPbI 3 /PCBM and then result in higher V oc . Moreover, non-fullerene material N2200 can efficiently inhibit the aggregation of PC 61 BM, promote perovskite surface grain growth and passivate perovskite interface defect. All these are beneficial for electron transfer and extraction, and thereby increase the short-circuit current ( J sc ) and the Fill Factor (FF) of N2200 PSCs. In addition, N2200 obviously improve the air- and illumination-stability of PSCs. These results could stem from the interaction between PbI 2 as Lewis acid and N2200 as Lewis base. This work indicate that N2200/PC 61 BM as double ETL is an effective way to get high photovoltaic performance for the inverted planar heterojunction PSCs.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2023
·Vol. 10
·期 3
·2300651
·
IF 6.2
Tianpeng Yu,Shuyi Hou,Zhenliang Liu,Yiru Wang,Jiang Yin,Xu Gao,Nannan Liu,Guoliang Yuan,Lei Wu,Yidong Xia,Zhiguo Liu
Organic field-effect transistors (OFETs) hold great promise for applications in non-volatile memories, detectors, and artificial synapses due to the good flexibility and biocompatibility. However, certain drawbacks such as high operating voltages and significant degradation in endurance characteristics have hindered their practical implementations. Herein, a novel approach is proposed to enhance the performance of OFETs by incorporating a bi-functional n-type polymer semiconductor interlayer, Poly-{[N,N'-bis(2-octyldodecyl)naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)} (N2200), into a pentacene OFET structure. The device exhibits remarkable improvements, with reliable P/E operation cycles of over than 10 4 and a retention time of more than 10 years. On one hand, the inclusion of N2200 as an n-type semiconductor effectively reduces the height of hole-injection barrier for trapping and thus reducing the working voltage based on the electrostatic induction theory. On the other hand, n-type semiconductor N2200 serves as a native hole-consumption (or hole-trapping) dielectric, and its narrower bandgap restrains the formation of deep hole-traps, thus favoring the endurance characteristics of the OFET.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Bingyang Liu,Jialin Wang,Guoxin Zhang,Gengxin Du,Huihui Xia,Weiwei Deng,Xinyan Zhao
Organic semiconductor (OSC) films fabricated by meniscus-guided coating (MGC) methods are suitable for cost-effective and flexible electronics. However, achieving crystalline thin films by MGC methods is still challenging because the nucleation and crystal growth processes are influenced by the intertwined interactions among solvent evaporation, stochastic nucleation, and the fluid flow instabilities. Herein, a novel flexible fountain pen with active ink supply is designed and used to print OSCs. This direct-write method allows the flexible pen tip to contact the substrate, maintaining a robust meniscus by eliminating the gap found in conventional MGCs. An in situ optical microscopy observation system shows that the precursor film plays a critical role on the crystallization and the formation of coffee rings and dendrites. The computational fluid dynamics simulations demonstrate that the microstructure of the pen promotes extensional flows, facilitating mass transport and crystal alignment. Highly-aligned ribbon-shaped crystals of a small organic molecule (TIPS-pentacene), as well as a semiconducting polymer (N2200) with highly-ordered orientations, have been successfully printed by the flexible fountain pen. Organic field-effect transistors based on the flexible pen printed OSCs exhibit high performances and strong anisotropic mobility. In addition, the flexible fountain pen is expandable for printing multiple lines or large-area films.
研究领域:
材料科学
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电子学
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纳米技术
·
化学
✓ 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）