Chandrasekharam M, Chiranjeevi B, Gupta K S V, Singh Surya Prakash, Islam A, Han L, Kantam M Lakshmi
Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India.
J Nanosci Nanotechnol. 2012 Jun;12(6):4489-94. doi: 10.1166/jnn.2012.6183.
Two new metal-free organic sensitizers with simplest structural variations have been synthesized for application in nanocrystalline TiO2 sensitized solar cells. The donor-pi-bridge-acceptor (D-pi-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%.
已经合成了两种具有最简单结构变化的新型无金属有机敏化剂，用于纳米晶二氧化钛敏化太阳能电池。供体-π-桥-受体（D-π-A）结构的染料Y2和Y3均由三部分设计而成，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），在器件中分别显示出高达67%和82%的最大单色入射光子到电流转换效率（IPCE）。以3,4,5-三甲氧基苯基（Y3）作为供体部分的有机敏化剂获得了3.30%的更好的太阳能到电能转换效率，而以2,4-二氟苯基作为供体的有机敏化剂（Y2）显示出相对较低的1.02%的效率。在类似的制备和评估条件下，参考敏化剂N719获得的效率为5.84%。
