We have prepared a novel piperidine-donor-substituted perylene sensitizer,
Dye-sensitized solar cells (DSSCs) have been widely investigated because of their simple structure and potential for low-cost production [
Derivatives of perylene have been widely applied in various optical devices owing to their outstanding chemical, thermal, and photochemical stability and nontoxicity [
Perylene derivatives.
Dehydrated DMF was purchased from Aldrich. The synthesis of
A mixture of compound
Crushed KOH pellets (1.5 g) were added to a suspension of
Preparation of
A nanocrystalline TiO2 photoelectrodes of 20
The working electrode was illuminated through a conducting glass. The current-voltage characteristics were measured using a solar simulator (AM-1.5, 100 mW/cm2, WXS-155S-10: Wacom Denso Co. Japan). Monochromatic incident photon-to-current conversion efficiency (IPCE) for the solar cell, plotted as a function of excitation wavelength, was recorded on a CEP-2000 system (Bunkoh-Keiki Co. Ltd.). Incident photon-to-current conversion efficiency (IPCE) at each incident wavelength was calculated from (
The absorption, excitation, and fluorescence spectra for
Physical properties of
Compound | Absorption | Fluorescence | Absorption on TiO2 film | IP | LUMO | |||
(eV) | (eV) | (eV) | ||||||
489 | 1.0 | 516 | 543 | 450 | −5.88 | 2.07 | −3.81 | |
544 | 1.6 | 580 | 655 | 500 | −5.60 | 1.77 | −3.83 |
Absorption, fluorescence, and excitation spectra of
Absorption spectra of
To obtain an insight into the electron distribution and relative energy level of
Frontier orbitals of
The ionization potential (IP) of
The photovoltaic properties of the solar cells fabricated with these organic dyes were measured under simulated AM 1.5G irradiation (100 mW cm−2). The open-circuit photovoltage (
The photovoltaic data of DSSCs based on
TBP | F.F. | Eff. [%] | |||
---|---|---|---|---|---|
0 | 7.6 | 0.45 | 0.63 | 2.2 | |
0.5 M | 4.1 | 0.56 | 0.69 | 1.6 | |
0 | 8.8 | 0.41 | 0.59 | 2.1 | |
0.5 M | 7.7 | 0.57 | 0.70 | 3.1 |
Photocurrent action spectra (IPCE) of nanocrystalline TiO2 film sensitized by
Figure
Photocurrent voltage characteristics of a nanocrystalline photoelectrochemical cell sensitized with the dye
We have synthesized a novel perylene derivative with a piperidine donor substituent,
This work was partially supported by the Nihon University Strategic Research Project “Nanotechnology Excellence” and Grant-in-Aid for Scientific Research, no. 22108532 (Innovative Areas ‘‘Coordination Programming’’ Area 2107) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.