Research Article

Influence of TiO2 Nanocrystals Fabricating Dye-Sensitized Solar Cell on the Absorption Spectra of N719 Sensitizer

Table 1

Morphology and surface area of the T i O 2 nanocrystals and the optical data of the N719 dye adsorbed onto T i O 2 nanocrystals films.

SampleMorphologySBET (m2/g)UV-vis abs. 𝜆 m a x (nm)b FT-IR vibration band wavenumber (cm−1)c
MLCT 𝜋 - 𝜋

ST01Spherical349398sh2105m 1657vs 1608vs 1541m 1467w 1430w 1403w
5231373vs 1262vw 1235w 1165w 1107vw
ST111Spherical312398sh2105s 1657vs 1608vs 1542m 1466vw 1429m
537 1402w 1372vs 1261vw 1236w 1166m 1109vw
QTBAQuadrate131395sh2103w 1657vs 1607vs 1540m 1467w 1429w 1402w
1372vs 1262vw 1236w 1167w 1108vw
QPAQuadrate665362104w 1713vw 1614vs 1544m 1466vw 1430m
1403m 1384vs 1262w 1231vw 1112w
LPALeaflike355982925s 2855m 2343w 2104m 1741m 1619s 1542m
1466w 1436w 1402m 1379s 1234m 1165w 1108w
QTBA-LPA631
QPA-LPA571
N719a390215 253sh 3132964s 2876w 2104vs 1714s 1611s 1543m 1467m
5311437vw 1406m 1370s 1237s 1149vw 1021w

aUV-vis absorption measured in ethanol, bsh: shoulder, cvs: very strong; s: strong; m: medium; w: weak; vw: very weak.