设计合成了两种D-A型共轭聚合物给体材料PBDT-BT,PBDT-FBT,研究了引入氟原子后,双直链噻吩修饰的苯并二噻吩共轭聚合物的热力学,光学,电学性质与光伏性能的变化。以聚合物/PC71BM作为活性层材料,研究了不同比例的给体受体对有机太阳能...设计合成了两种D-A型共轭聚合物给体材料PBDT-BT,PBDT-FBT,研究了引入氟原子后,双直链噻吩修饰的苯并二噻吩共轭聚合物的热力学,光学,电学性质与光伏性能的变化。以聚合物/PC71BM作为活性层材料,研究了不同比例的给体受体对有机太阳能电池光伏性能的影响。两种聚合物热力学分解温度均超过了400℃,同时表现出不错的吸光能力。较低的HOMO能级使得PBDT-BT与PBDT-FBT的开路电压均超过了0.85 e V,通过器件结构ITO/PEDOT:PSS/Active Layer/Ca/Al,优化得到的光伏性能分别为2.42%与3.55%。展开更多
In this paper, we investigate the effects of glycerol doping on transmittance, conductivity and surface morphology of poly（3,4-ethylene dioxythiophene）：poly（styrene sulfonate））（PEDOT：PSS） and its influence on...In this paper, we investigate the effects of glycerol doping on transmittance, conductivity and surface morphology of poly（3,4-ethylene dioxythiophene）：poly（styrene sulfonate））（PEDOT：PSS） and its influence on the performance of perovskite solar cells.. The conductivity of PEDOT：PSS is improved obviously by doping glycerol. The maximum of the conductivity is 0.89 S/cm when the doping concentration reaches 6 wt%, which increases about 127 times compared with undoped. The perovskite solar cells are fabricated with a configuration of indium tin oxide（ITO）/PEDOT：PSS/CH_3NH_3PbI_3/PC_（61）BM/Al, where PEDOT：PSS and PC_（61）BM are used as hole and electron transport layers, respectively. The results show an improvement of hole charge transport as well as an increase of short-circuit current density and a reduction of series resistance, owing to the higher conductivity of the doped PEDOT：PSS. Consequently, it improves the whole performance of perovskite solar cell. The power conversion efficiency（PCE） of the device is improved from 8.57% to 11.03% under AM 1.5 G（100 mW/cm^2 illumination） after the buffer layer has been modified.展开更多
噻咯(silole)是一类含硅的五元环二烯,具有很好的电子亲和力、独特的聚集态诱导发光性质和优良的电致发光性能.研究者发现将噻咯结构单元引入分子主链中,能够获得具有特殊光电性能的聚合物材料.本工作合成两种2,5位为二噻吩苯并噻二唑...噻咯(silole)是一类含硅的五元环二烯,具有很好的电子亲和力、独特的聚集态诱导发光性质和优良的电致发光性能.研究者发现将噻咯结构单元引入分子主链中,能够获得具有特殊光电性能的聚合物材料.本工作合成两种2,5位为二噻吩苯并噻二唑的新型噻咯单体,通过与芴或硅芴双硼酸酯Suzuki偶联聚合,制备四种主链型D-A(推-拉电子结构)共聚物PF-HSTBT,PF-HOSTBT,PSi F-HSTBT和PSi F-HOSTBT.研究表明,四种聚合物具有较好的吸收,光学带隙均小于1.71 e V.电化学分析测得四种聚合物的HOMO能级均小于-5.29 e V,通过光学带隙计算得LUMO能级均高于-3.61 e V.以四种聚合物分别作为电子给体材料,PC61BM为受体材料,制备了聚合物太阳能电池器件(PSCs).由于聚合物PF-HOSTBT、PSi F-HOSTBT中的己氧基空间位阻较大,分子平面规整性较差,其最高光电转换效率分别为0.62%、0.83%;而己基的空间位阻较小,分子堆积紧密,聚合物PF-HSTBT,PSi F-HSTBT的光伏性能较优,PSCs的最高光电转换效率分别为1.18%,1.2%.展开更多
文摘设计合成了两种D-A型共轭聚合物给体材料PBDT-BT,PBDT-FBT,研究了引入氟原子后,双直链噻吩修饰的苯并二噻吩共轭聚合物的热力学,光学,电学性质与光伏性能的变化。以聚合物/PC71BM作为活性层材料,研究了不同比例的给体受体对有机太阳能电池光伏性能的影响。两种聚合物热力学分解温度均超过了400℃,同时表现出不错的吸光能力。较低的HOMO能级使得PBDT-BT与PBDT-FBT的开路电压均超过了0.85 e V,通过器件结构ITO/PEDOT:PSS/Active Layer/Ca/Al,优化得到的光伏性能分别为2.42%与3.55%。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61264002,61166002,91333206,and 51463011)the Natural Science Foundation of Gansu Province,China(Grant No.1308RJZA159)+2 种基金the New Century Excellent Talents in University of Ministry of Education of China(Grant No.NCET-13-0840)the Research Project of Graduate Teacher of Gansu Province,China(Grant No.2014A-0042)the Postdoctoral Science Foundation from Lanzhou Jiaotong University,China
文摘In this paper, we investigate the effects of glycerol doping on transmittance, conductivity and surface morphology of poly（3,4-ethylene dioxythiophene）：poly（styrene sulfonate））（PEDOT：PSS） and its influence on the performance of perovskite solar cells.. The conductivity of PEDOT：PSS is improved obviously by doping glycerol. The maximum of the conductivity is 0.89 S/cm when the doping concentration reaches 6 wt%, which increases about 127 times compared with undoped. The perovskite solar cells are fabricated with a configuration of indium tin oxide（ITO）/PEDOT：PSS/CH_3NH_3PbI_3/PC_（61）BM/Al, where PEDOT：PSS and PC_（61）BM are used as hole and electron transport layers, respectively. The results show an improvement of hole charge transport as well as an increase of short-circuit current density and a reduction of series resistance, owing to the higher conductivity of the doped PEDOT：PSS. Consequently, it improves the whole performance of perovskite solar cell. The power conversion efficiency（PCE） of the device is improved from 8.57% to 11.03% under AM 1.5 G（100 mW/cm^2 illumination） after the buffer layer has been modified.
文摘噻咯(silole)是一类含硅的五元环二烯,具有很好的电子亲和力、独特的聚集态诱导发光性质和优良的电致发光性能.研究者发现将噻咯结构单元引入分子主链中,能够获得具有特殊光电性能的聚合物材料.本工作合成两种2,5位为二噻吩苯并噻二唑的新型噻咯单体,通过与芴或硅芴双硼酸酯Suzuki偶联聚合,制备四种主链型D-A(推-拉电子结构)共聚物PF-HSTBT,PF-HOSTBT,PSi F-HSTBT和PSi F-HOSTBT.研究表明,四种聚合物具有较好的吸收,光学带隙均小于1.71 e V.电化学分析测得四种聚合物的HOMO能级均小于-5.29 e V,通过光学带隙计算得LUMO能级均高于-3.61 e V.以四种聚合物分别作为电子给体材料,PC61BM为受体材料,制备了聚合物太阳能电池器件(PSCs).由于聚合物PF-HOSTBT、PSi F-HOSTBT中的己氧基空间位阻较大,分子平面规整性较差,其最高光电转换效率分别为0.62%、0.83%;而己基的空间位阻较小,分子堆积紧密,聚合物PF-HSTBT,PSi F-HSTBT的光伏性能较优,PSCs的最高光电转换效率分别为1.18%,1.2%.
