Dye‐Sensitized Solar Cells Based On Donor–Acceptor π‐Conjugated Fluorescent Dyes with a Pyridine Ring as an Electron‐Withdrawing Anchoring Group

Abstract

Gut befestigt: Die Photostromdichte und der Wirkungsgrad von Solarzellen auf der Basis Pyridin‐haltiger, π‐konjugierter Donor‐Akzeptor(D‐π‐A)‐Farbstoffe (siehe Schema) übertreffen die Parameter herkömmlicher D‐π‐A‐Farbstoffsensibilisatoren mit Carboxygruppen als elektronenziehender Ankergruppe. Die Farbstoffe sind über eine koordinative Bindung zu den Lewis‐sauren Zentren von TiO2 an der Oberfläche befestigt.

Electron‐Acceptor‐Dependent Light Absorption, Excited‐State Relaxation, and Charge Generation in Triphenylamine Dye‐Sensitized Solar Cells

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Considerable advances in power-conversion efficiencies (PCEs) have been achieved in the past decade, mainly by logically conjugating electron-rich and electron-deficient segments and rationally modulating non-photoactive auxiliary moieties. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Considerable advances in power-conversion efficiencies (PCEs) have been achieved in the past decade, mainly by logically conjugating electron-rich and electron-deficient segments and rationally modulating non-photoactive auxiliary moieties.…”

Synthesis of Specific Solvatochromic D‐π‐A Dyes with Pyridinium Ring as Electron‐Withdrawing Group for Dye‐Sensitized Solar Cells

“…[12] (0.10 g, 0.21 mmol) and 5-bromopentanoic acid (0.038 g, 0.21 mmol) in anhydrous DMF (20 mL) was stirred at 90°C for 3 h. After concentrating under reduced pressure, the resulting residue was washed with acetone and then toluene to give OD6 (0.012 g, 9 %) as a yellow solid. High-resolution mass spectrometric data were acquired with a Thermo Fisher Scientific LTQ Orbitrap XL.…”

“…The D-π-A-type pyridinium dyes OD5 and OD6 were synthesized from diphenyl{7-[5-(pyridin-4-yl)thiophen-2yl]-9H-carbazol-2-yl}amine (1) [12] and 1,4-butanesultone or 5-bromopentanoic acid (Scheme 1).…”

Stable Dyes Containing Double Acceptors without COOH as Anchors for Highly Efficient Dye‐Sensitized Solar Cells

“…[2][3][4][5][6][7][8] Among donor groups, triphenylamine and its derivatives have shown promise in the development of DSSCs owing to their nonplanar structure suppressing the dye aggregation. [11] Recently, pyridine, [12] phosphinic acid, [13] and 8-hydroxylquinoline [10] have been explored as anchoring groups; nevertheless, the efficiencies of DSSCs based on these acceptors still lag behind that of cyanoacrylic acid counterparts. In particular, the introduction of cyanoacrylic acid as electron-accepting unit has witnessed the rapid development of organic dyes as sensitizers.…”