聚合物太阳能电池(polymer solar cell,简称PSC)是重要的光电转换器件.近年来,基于非富勒烯型电子受体的聚合物太阳能电池(NF-PSC)发展迅速.迄今为止,单结NF-PSC的光伏效率已经达到13%以上,超过了传统的富勒烯型聚合物太阳能电池.相比...聚合物太阳能电池(polymer solar cell,简称PSC)是重要的光电转换器件.近年来,基于非富勒烯型电子受体的聚合物太阳能电池(NF-PSC)发展迅速.迄今为止,单结NF-PSC的光伏效率已经达到13%以上,超过了传统的富勒烯型聚合物太阳能电池.相比于单结NF-PSC,叠层NF-PSC有助于克服外量子效率受限和热损耗偏高的问题.然而,叠层NF-PSC的构筑,对于材料的设计要求更高,器件制备的难度也更大,因而发展相对缓慢.最近,侯剑辉等对叠层NF-PSC中的前、后子电池之间的光谱匹配性进行了优化调制,选用窄带隙的PTB7-Th:IEICO-4F作为后电池,宽带隙的J52-2F:IT-M作为前电池,来构建叠层NF-PSC,将光伏效率进一步提升到了14.9%,目前为该领域的最高值.本文将简要介绍NF-PSC的发展概况,评述这一突出的研究成果,总结中国学术界在NF-PSC领域做出的卓越贡献,并展望该领域的广阔前景.展开更多
A series of shape-persistent polyphenylene dendritic C_(60)derivatives as the electron transport materials were designed and synthesized via a catalyst-free Diels-Alder[4+2]cycloaddition reaction.These increasing hype...A series of shape-persistent polyphenylene dendritic C_(60)derivatives as the electron transport materials were designed and synthesized via a catalyst-free Diels-Alder[4+2]cycloaddition reaction.These increasing hyperbranched scaffolds could effectively enhance the solubility;notably,both first and second generation dendrimers,C_(60)-G1 and C_(60)-G2,demonstrated more than 5 times higher solubilities than pristine C_(60).Furthermore,both simulated and experimental data proved their promising solution-processabilities as electron-transporting layers(ETLs)for perovskite solar cells.As a result,the planar p-i-n structural perovskite solar cell could achieve a maximum power conversion efficiency of 14.7%with C_(60)-G2.展开更多
A fused-ring electron acceptor IDT-2BR1 based on indacenodithiophene core with hexyl side-chains flanked by benzothiadiazole rhodanine was designed and synthesized.In comparison with its counterpart with hexylphenyl s...A fused-ring electron acceptor IDT-2BR1 based on indacenodithiophene core with hexyl side-chains flanked by benzothiadiazole rhodanine was designed and synthesized.In comparison with its counterpart with hexylphenyl side-chains(IDT-2BR),IDT-2BR1exhibits higher highest occupied molecular orbital(HOMO)energy but similar lowest unoccupied molecular orbital(LUMO)energy(IDT-2BR1:HOMO=-5.37eV,LUMO=-3.67eV;IDT-2BR:HOMO=-5.52eV,LUMO=-3.69eV),red-shifted absorption and narrower bandgap.IDT-2BR1 has higher electron mobility(2.2×10^(-3)cm^2 V^(-1)s^(-1))than IDT-2BR(3.4×10^(-4)cm^2 V^(-1)s^(-1))due to the reduced steric hindrance and ordered molecular packing.Fullerene-free organic solar cells based on PTB7-Th:IDT-2BRl yield power conversion efficiencies up to 8.7%,higher than that of PTB7-Th:IDT-2BR(7.7%),with a high open circuit voltage of0.95 V and good device stability.展开更多
文摘聚合物太阳能电池(polymer solar cell,简称PSC)是重要的光电转换器件.近年来,基于非富勒烯型电子受体的聚合物太阳能电池(NF-PSC)发展迅速.迄今为止,单结NF-PSC的光伏效率已经达到13%以上,超过了传统的富勒烯型聚合物太阳能电池.相比于单结NF-PSC,叠层NF-PSC有助于克服外量子效率受限和热损耗偏高的问题.然而,叠层NF-PSC的构筑,对于材料的设计要求更高,器件制备的难度也更大,因而发展相对缓慢.最近,侯剑辉等对叠层NF-PSC中的前、后子电池之间的光谱匹配性进行了优化调制,选用窄带隙的PTB7-Th:IEICO-4F作为后电池,宽带隙的J52-2F:IT-M作为前电池,来构建叠层NF-PSC,将光伏效率进一步提升到了14.9%,目前为该领域的最高值.本文将简要介绍NF-PSC的发展概况,评述这一突出的研究成果,总结中国学术界在NF-PSC领域做出的卓越贡献,并展望该领域的广阔前景.
基金Projects(2017YFE0131900,2017YFB0404500)supported by National Key Research and Development Program of ChinaProjects(91833306,91733302,62075094)supported by the National Natural Science Foundation of China+1 种基金Project(202003N4004)supported by the Ningbo Natural Science Foundation,ChinaProject(2020GXLH-Z-014)supported by the Joint Research Funds of Department of Science&Technology of Shaanxi Province and Northwestern Polytechnical University,China。
文摘A series of shape-persistent polyphenylene dendritic C_(60)derivatives as the electron transport materials were designed and synthesized via a catalyst-free Diels-Alder[4+2]cycloaddition reaction.These increasing hyperbranched scaffolds could effectively enhance the solubility;notably,both first and second generation dendrimers,C_(60)-G1 and C_(60)-G2,demonstrated more than 5 times higher solubilities than pristine C_(60).Furthermore,both simulated and experimental data proved their promising solution-processabilities as electron-transporting layers(ETLs)for perovskite solar cells.As a result,the planar p-i-n structural perovskite solar cell could achieve a maximum power conversion efficiency of 14.7%with C_(60)-G2.
基金supported by the National Basic Research Program of China(2013CB834702)the National Natural Science Foundation of China(91433114)
文摘A fused-ring electron acceptor IDT-2BR1 based on indacenodithiophene core with hexyl side-chains flanked by benzothiadiazole rhodanine was designed and synthesized.In comparison with its counterpart with hexylphenyl side-chains(IDT-2BR),IDT-2BR1exhibits higher highest occupied molecular orbital(HOMO)energy but similar lowest unoccupied molecular orbital(LUMO)energy(IDT-2BR1:HOMO=-5.37eV,LUMO=-3.67eV;IDT-2BR:HOMO=-5.52eV,LUMO=-3.69eV),red-shifted absorption and narrower bandgap.IDT-2BR1 has higher electron mobility(2.2×10^(-3)cm^2 V^(-1)s^(-1))than IDT-2BR(3.4×10^(-4)cm^2 V^(-1)s^(-1))due to the reduced steric hindrance and ordered molecular packing.Fullerene-free organic solar cells based on PTB7-Th:IDT-2BRl yield power conversion efficiencies up to 8.7%,higher than that of PTB7-Th:IDT-2BR(7.7%),with a high open circuit voltage of0.95 V and good device stability.
