Simple Metal-Free Organic D-π-A Dyes with Alkoxy- or Fluorine Substitutions: Application in Dye Sensitized Solar Cells
作者:M. Chandrasekharam、B. Chiranjeevi、K. S. V. Gupta、Surya Prakash Singh、A. Islam、L. Han、M. Lakshmi Kantam
DOI:10.1166/jnn.2012.6183
日期:2012.6.1
Two new metal-free organic sensitizers with simplest structural variations have been synthesized for application in nanocrystalline TiO2 sensitized solar cells. The donor-π-bridge-acceptor (D-π- A) structure dyes, Y2 and Y3 each designed with three parts, an electron donor unit (substituted phenyl), a linker unit (thiophene), and an anchor unit (cyanoacrylic acid) showed maximal monochromatic incident photon to current conversion efficiencies (IPCE) in a device reaching upto 67% and 82% respectively. The organic sensitizers with 3,4,5-trimethoxy phenyl (Y3) as donor moieties obtained better solar light to electrical energy conversion efficiencies of 3.30% where as the organic sensitizer with 2,4-difluoro phenyl as donor (Y2) showed comparatively lower efficiency of 1.02%. The efficiency obtained with the reference sensitizer N719 under similar fabrication and evaluation conditions was 5.84%.
两种新的无金属有机敏化剂具有最简单的结构变化,已合成用于纳米晶TiO2敏化太阳能电池。供体-π-桥-受体(D-π- A)结构染料Y2和Y3分别由三个部分组成,即电子供体单元(取代苯基)、连接单元(噻吩)和锚定单元(氰基丙烯酸),在器件中分别达到67%和82%的最大单色入射光子到电流的转换效率(IPCE)。以3,4,5-三甲氧基苯(Y3)为供体的有机敏化剂获得了3.30%的更好的太阳光到电能转换效率,而以2,4-二氟苯为供体的有机敏化剂(Y2)则表现出相对较低的1.02%的效率。在类似的制造和评估条件下,参考敏化剂N719的效率为5.84%。