The effect of porphyrins suspended with different electronegative moieties on the photovoltaic performance of monolithic porphyrin-sensitized solar cells with carbon counter electrodes
A Zinc Porphyrin Sensitizer Modified with Donor and Acceptor Groups for Dye-Sensitized Solar Cells
作者:Seewoo Lee、Ashis K. Sarker、Jong-Dal Hong
DOI:10.5012/bkcs.2014.35.10.3052
日期:2014.10.20
In this article, we have designed and synthesized a novel donor-$\pi}$-acceptor (D-$\pi}$-A) type porphyrin-based sensitizer (denoted UI-5), in which a carboxyl anchoring group and a 9,9-dimethyl fluorene were introduced at the meso-positions of porphyrin ring via phenylethynyl and ethynyl bridging units, respectively. Long alkoxy chains in ortho-positions of the phenyls were supposed to reduce the degree of dye aggregation, which tends to affect electron injection yield in a photovoltaic cell. The cyclic voltammetry was employed to determine the band gap of UI-5 to be 1.41 eV based on the HOMO and LUMO energy levels, which were estimated by the onset oxidation and reduction potentials. The incident monochromatic photon-to-current conversion efficiency of the UI-5 DSSC assembled with double-layer (20 nm-sized $TiO_2$/400 nm-sized $TiO_2$) film electrodes appeared lower upon overall ranges of the excitation wavelengths, but exhibited a higher value over the NIR ranges ($\lambda}$ = 650-700 nm) compared to the common reference sensitizer N719. The UI-5-sensitized cell yielded a relatively poor device performance with an overall conversion efficiency of 0.74% with a short circuit photocurrent density of $3.05mA/cm^2$, an open circuit voltage of 0.54 mV and a fill factor of 0.44 under the standard global air mass (AM 1.5) solar conditions. However, our report about the synthesis and the photovoltaic characteristics of a porphyrin-based sensitizer in a D-$\pi}$-A structure demonstrated a significant complex relationship between the sensitizer structure and the cell performance.
GREEN ZINC PORPHYRIN SENSITIZERS AND THEIR APPLICATIONS
申请人:YEH Chen-Yu
公开号:US20130090469A1
公开(公告)日:2013-04-11
The present invention relates to zinc porphyrin-based photosensitive dyes, specifically to zinc porphyrin-based photosensitive dyes with green transparency. The photosensitive dyes exhibit high push-pull ability in the zinc porphyrin-based structure, higher absorption and power conversion efficiency. The photosensitive dyes are used in the manufacture of dye-sensitive solar cells.
The effect of different alkyl chains on the photovoltaic performance of D–π–A porphyrin-sensitized solar cells
作者:Jiangzhao Chen、Songguk Ko、Linfeng Liu、Yusong Sheng、Hongwei Han、Xiong Li
DOI:10.1039/c4nj02263g
日期:——
Compared to the DSSCs based on WH-C1 and YD20 with short alkyl chains, the device sensitized by WH-C2 with the hexyloxy group shows a significantly enhanced Voc, Jsc and power conversion efficiency (η).
The effect of porphyrins suspended with different electronegative moieties on the photovoltaic performance of monolithic porphyrin-sensitized solar cells with carbon counter electrodes
作者:Jiangzhao Chen、Songguk Ko、Linfeng Liu、Yusong Sheng、Hongwei Han、Xiong Li
DOI:10.1039/c4nj02186j
日期:——
Compared with WH-C3 and WH-C4, the WH-C5-sensitized device shows a significantly enhanced Voc, Jsc and power conversion efficiency (η).
2-Ethynyl-6-methylthieno[3,2- b ]thiophene as an efficient π spacer for porphyrin-based dyes
作者:Huifang Zhao、Jun Long、Xi Luo、Bin Zhao、Songting Tan
DOI:10.1016/j.dyepig.2015.06.024
日期:2015.11
ethynyl-thiophthene as π spacer and carboxylic acid as anchor group. Compared with the dye containing ethynyl-thiophene as π spacer, the dyes containing 2-ethynyl-6-methylthieno[3,2-b]thiophene as π spacer between the porphyrin macrocycle and the carboxylic acid anchoring group show broadened absorption spectra on TiO2 films and red-shifted absorption spectra in solution. The dye based on triphenylamine
在这项研究中,已经设计并合成了三种供体-π-受体(D-π-A)型不对称卟啉基染料,用于染料敏化太阳能电池(DSSC)。通过使用功能化的芳基胺(三苯胺或N,N-二甲基-4-(乙炔)-苯胺)作为供体,卟啉衍生物作为共轭π桥,乙炔基噻吩或乙炔基-β,成功地调节了染料的光物理,电化学和光伏性质。噻吩作为π间隔基,羧酸作为锚定基团。与以乙炔基噻吩为π间隔基的染料相比,在卟啉大环与羧酸锚定基团之间以2-乙炔基-6-甲基噻吩并[3,2- b ]噻吩为π间隔基的染料在TiO 2上具有更宽的吸收光谱。薄膜和溶液中的红移吸收光谱。基于三苯胺和2-乙炔基-6-甲基噻吩并[3,2- b ]噻吩的染料在模拟空气质量1.5的全球日照下表现出4.53%的功率转换效率(PCE)。这些结果表明,在卟啉染料的介孔位置引入2-乙炔基-6-甲基噻吩并[3,2- b ]噻吩是提高光伏性能的有效方法。