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Non-fused medium bandgap electron acceptors for efficient organic photovoltaics

Journal of Energy Chemistry 2022年第7期31卷 576-582,I0014页

作者： Tian-Jiao Wen Jiale Xiang nakul jain Zhi-Xi Liu Zeng Chen Xinxin Xia Xinhui Lu Haiming Zhu Feng Gao Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Department of Physics Chemistry and Biology(IFM) Link?ping UniversityLinköping SE-58183Sweden Department of Chemistry Zhejiang UniversityHangzhou 310027ZhejiangChina Department of Physics The Chinese University of Hong KongNew TerritoriesHong Kong 999077China

The cost-effective organic semiconductors are strongly needed in organic photovoltaics(OPVs). Herein,two medium bandgap(MBG) electron acceptors, TPT4F and TPT4Cl are developed via the new design of multi-noncovalent interaction assisted unfused core, flanked with two electron withdrawing end groups. These fullly non-fused MBG acceptors adapt the planar and rigid conformation in solid, therefore exhibiting the ordered face-on stacking and strong photoluminescence in films. As results, TPT4Cl^(-)based OPVs, upon blending with the PBDB-TF polymer donor, have achieved a power conversion efficiency of 10.16% with a low non-radiative loss of 0.27 e V, representing one of the best fullly non-fused medium bandgap acceptors with desirable cost-efficiency balance.

关键词： Organic photovoltaic Medium bandgap Electron withdrawing unit Non-covalent interaction

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基于ZigBee/IEEE 802.15.4的低成本辅助驾驶系统

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电子产品世界 2009年第11期16卷 58-61页

作者： Suhas Chakravarty Varun jain nakul Midha Prashant Bhargava 飞思卡尔印度设计中心

本文提出一个完整的基于ZigBee的驾驶辅助系统解决方案,该方案充分利用了具有低成本、低功耗和安全无线网络功能等特性的ZigBee协议。

关键词： ZigBee IEEE802 15.4 MC1322x

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Green Approach for <i>In-Situ</i>Growth of CdS Nanorods in Low Band Gap Polymer Network for Hybrid Solar Cell Applications

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Advances in Nanoparticles 2014年第3期3卷 106-113页

作者： Ramil K. Bhardwaj Vishal Bharti Abhishek Sharma Dibyajyoti Mohanty Vikash Agrawal nakul Vats Gauri D. Sharma Neeraj Chaudhary Shilpa jain Jitender Gaur Kamalika Banerjee Suresh Chand J & S Research and Innovations Delhi India Physics of Energy Harvesting CSIR-National Physical Laboratory New Delhi India Physics of Energy Harvesting CSIR-National Physical Laboratory New Delhi India School of Science India Gandhi National Open University New Delhi India School of Science India Gandhi National Open University New Delhi India

In-situ growth of CdS nanorods (NRs) has been demonstrated via solvothermal, in a low band gap polymer, poly [[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b’] dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7). It is a high yielding, green approach as it removes use of volatile and hazardous chemicals such as pyridine as ligand which are conventionally used to synthesize precursors of CdS (NRs). Moreover the solvothermal process is a zero emission process being a close vessel synthesis and hence no material leaching into the atmosphere during the synthesis. The PTB7:CdS nanocomposite has been characterized by SEM, XRD, FTIR, UV-visible spectroscopy techniques. The photoluminescence (PL) spectroscopy study of PTB7 with CdS NRs has shown significant PL quenching by the incorporation of CdS NRs in PTB7;this shows that CdS NRs are efficient electron acceptors with the PTB7. The PTB7:CdS is used as active layer in the fabrication of hybrid solar cells (HSC) as donor-acceptor combination in the bulk heterojunction (BHJ) geometry. The HSCs fabricated using this active layer without any additional supporting fullerene based electron acceptor has given power conversion efficiency of above 1%.

关键词： CdS Nanorods PTB7 In-Situ Growth Solvothermal Hybrid Solar Cell

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