Efficient and stable dye-sensitized solar cells based on phenothiazine sensitizers with thiophene units

Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime

“…[47] These results are consistent with those pub- www.chemeurj.org lished for PTZ-based dyes. [23,26] The fairly low currents measured for all of the dyes are probably a result of absorption at short wavelengths, which affects the LHE of the solar cell. For better LHE, the absorption properties of the dyes need to be improved; a broader, redshifted spectrum and also an increase in extinction coefficients are desirable.…”

“…Despite this, most of the previous work has focused on PTZ as the donor. [23,26,29,30] In 2009, we published two dyes based on POZ, TH301 and TH305, which gave efficiencies up to 7.7 %, [25] and the panchromatic dye TH304 with absorption into the NIR region. [27] A comparison between POZ-and PTZ-based sensitizers showed that the POZ-based dye TH301 gave an efficiency of 6.2 % and the structurally similar PTZ-based T2-1 showed an efficiency of 5.5 % under similar conditions.…”

“…With top efficiencies reaching 10 %, [7,8] the distance to the best inorganic dyes-with efficiencies of approximately 11 % [9,10] -should not be unreachable anymore. Many different kinds of chromophores have been examined in DSCs (such as porphyrin, [11,12] phthalocyanine, [13] indoline, [14,15] perylene, [16] triphenylamine (TPA), [7,8,[17][18][19][20][21][22] and hetero-anthracene) [23][24][25][26][27] and give efficiencies in the range of 5-11 %. Recently, TPA-based chromophores have gained great attention due to their potential as electron donors.…”

Dye-sensitized solar cells: Investigation of D-A-π-A organic sensitizers based on [1,2,5]selenadiazolo[3,4-c]pyridine

“…S2) combined with UV-Vis absorption spectra ( Fig. 1(a)) for the OKT dye series in DMF/DCM (V/V=7/3) solution [18][19][20][21][22][23][24][25]. As a result, the HOMO orbitals were -5.88, -5.84, -5.85, -6.09, -6.07, -6.09 and -6.04 eV, and the LUMO levels were -3.79, -3.98, -4.03, -3.76, -3.90, -3.97 and -4.03 eV vs. vacuum for OKT-1-7 (Table 2), respectively.…”

Investigation of Optical Properties of Solochrome Dark Blue Dye Doped Polymer Films

“…Nonlinear optical materials have received much interest because of their potential applications in optical devices such as, light emitting diodes, solar cells, optical sensors, optical signal processing, optical switching, optical power limiting, and optoelectronic devices [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The optical and electrical properties of wide range of materials, including organic and inorganic materials, semiconductors, and polymer materials, have been studied to develop practical optical devices [16][17][18][19][20][21][22][23].…”