Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime
作者:Karl Martin Karlsson、Xiao Jiang、Susanna K Eriksson、Erik Gabrielsson、Håkan Rensmo、Anders Hagfeldt、Licheng Sun
DOI:10.1002/chem.201003730
日期:2011.5.27
metal‐free organic dyes with a core phenoxazine chromophore have been synthesized and tested as sensitizers in dye‐sensitizedsolarcells. Overall conversion efficiencies of 6.03–7.40 % were reached under standard AM 1.5G illumination at a light intensity of 100 mW cm−2. A clear trend in electronlifetime could be seen; a dye with a furan‐conjugated linker showed a shorter lifetime relative to dyes with the
已经合成了一系列具有核心吩恶嗪发色团的无金属有机染料,并在染料敏化太阳能电池中用作敏化剂进行了测试。在标准AM 1.5G照明下,光强度为100 mW cm -2时,总转换效率达到6.03-7.40%。可以看出电子寿命有明显的趋势。与具有直接连接到吩恶嗪上的受体基团的染料相比,具有呋喃共轭的接头的染料显示出较短的寿命。在吩恶嗪的7位上增加一个带有绝缘的烷氧基链的额外供体单元,可以进一步延长寿命,并且与电解质中的添加剂一起提高导带,可以提供800 mV的开路电压取得成就。从TiO 2颗粒上吸附的染料的光电子能谱和X射线吸收光谱,可以得出结论,激发主要是氰基特性的(即,平均而言,染料分子从表面站立并指出)。的TiO 2颗粒)。
A New Series of EDOT Based Co-Sensitizers for Enhanced Efficiency of Cocktail DSSC: A Comparative Study of Two Different Anchoring Groups
作者:Ganesh Koyyada、Ramesh Kumar Chitumalla、Suresh Thogiti、Jae Hong Kim、Joonkyung Jang、Malapaka Chandrasekharam、Jae Hak Jung
DOI:10.3390/molecules24193554
日期:——
of a new class of five EDOT based co-sensitizers (CSGR1-5) by introducing different donors (2,3,4-trimethoxypheny, 2,4-dibutoxyphenyl, and 2,4-difluorophenyl) and anchoring groups (rhodamine-3-aceticacid and cyanoacetic acid) systematically. The synthesized metal-free organic co-sensitizers were employed for cocktail dye-sensitizedsolarcells along with N749 (black dye). The DSSC devices with a mixture
Symmetric and unsymmetric donor functionalization. comparing structural and spectral benefits of chromophores for dye-sensitized solar cells
作者:Daniel P. Hagberg、Xiao Jiang、Erik Gabrielsson、Mats Linder、Tannia Marinado、Tore Brinck、Anders Hagfeldt、Licheng Sun
DOI:10.1039/b911397p
日期:——
A series of organic chromophores have been synthesized in order to investigate the benefits of structural versus spectral properties as well as the absorption properties and solar cell performance with unsymmetrically introduced substituents in the chromophore. Exceptionally high open-circuit voltage, Voc, was found for the symmetrical structurally benefited dye, which also gave the best overall solar cell performance.
Modifying organic phenoxazine dyes for efficient dye-sensitized solar cells
作者:Haining Tian、Ilkay Bora、Xiao Jiang、Erik Gabrielsson、Karl Martin Karlsson、Anders Hagfeldt、Licheng Sun
DOI:10.1039/c1jm12071a
日期:——
Four organic dyes bearing the phenoxazine chromophore have been synthesized and applied in dye-sensitized solar cells (DSCs). The effect of different dye structures on the performance of the DSCs was investigated systematically with photophysical, photovoltaic as well as photoelectrochemical methods. Due to the slow recombination process between injected electrons and electrolyte, the IB3 dye with two 2,4-dibutoxyphenyl units showed the best efficiency of 7.0% under 100 mW cm−2 light illumination in the liquid state-DSCs. Moreover, the phenoxazine dyes-based solid state-DSCs were fabricated for the first time. With the IB4 dye, a higher efficiency of 3.2% has been achieved under the same light intensity.