Department of Chemistry, Institute of Science, Banaras Hindu University Varanasi 221005, India

BET surface area
volume (cm3 /g)
0.1622
680
5.4
G-TNP 0.2151
(m2 /g)
506
8.56 × 10ÿ8
IC Maurya, et al.
2.0
Sample BJH adsorption cumulative pore
TNP
Sample Jsc (mA/cm2 ) Voc (mV) FF (%) ÿ (%) amount of dye (mol/cm2 )
100
G-TNP 9.0
2.97
TNP
5.12 × 10ÿ8
Pore Size
10.6
seventy three
65
(nm)
80
1.03
Po )mn·g/
³mc(emuloVer
rewoP
( mcWm
-2)
Photocurrent
(mA/
cm2 )
)PTS(debrosdAemuloV
957
Solar Energy 194 (2019) 952–958
0
1.0
0.02
0.0
80
0.2
0.6 0.8
Relative Pressure (P/Po)
200
120
0.00
0
0.01
10 20 30 40 50 60 70
0.03
40
160
0.4
0.04
Table 1
Photovoltaic cell output parameters and dye loading for TNP and G-TNP based
Fig. 7. Nitrogen adsorption desorption isotherms (a) and corresponding pore size distribution curves (b) of TNP and G-TNP.
Table 2
Porosity and surface area of TNP and G-TNP.
DSSC.
Fig. 8. Current-voltage (JV) curves (a) and Power curves (b) of TNP and G-TNP photoanode under illumination with a light intensity 100 mWcmÿ2.
0.0
1.4
4
-0.2
0
6
twelfth
-0.4
-0.6
ten
0.0
0.0
0.7
-0.2
-0.4
2.8
2.1
3.5
2
-0.6
8
(a)
(b)
(a)
(b)
G -TNP
TNP
TNP
Voltage (V)
Voltage (V)
G -TNP
Than TNP films. An overall current conversion efficiency of 3% has been
two thousand and thirteen). Fig.
8b demonstrates the corresponding power curves for TNP
The presence of pure anatase phase, mesoporous structure with larger
In this study, we demonstrate the synthesis of TNP and G-TNP
in the power conversion efficiency of the solar cell. The photocurrent
The enhancement in efficiency may be attributed to the combina tion of
various factors. G-TNP film is highly crystalline in nature and
properties and dye loading capability which subsequently help to im prove
overall photovoltaic performances.
improvement of overall photovoltaic performances.
phase of brookite and anatase was found in TNP. The BET measurement
and enhanced surface area in the G-TNP as compared to that of TNP.
Therefore, it may be concluded that the development of mesoporous
the performance of DSSC greatly depends on the phase of the samples,
that the saturated dye adsorption of porous G-TNP film was
HRTEM studies suggested that the synthesized TNP and G-TNP have
facile and efficient interfacial electron transfer between TiO2, dye, and
achieved for this film. The study therefore presented here offers several
photoelectrodes by using sol-gel synthesis route without and with the
density of the DSSC made from mesoporous G-TNP film is much higher
pore size and enhanced surface area of G-TNP facilitates charge transfer
and G-TNP based cells respectively.
4. Conclusion
The G-TNP photonanodes demonstrated a significant relative enhancement
The dye absorption study using the UV-vis absorption spectra of
present in pure anatase phase, which helps in better electron transport.
solutions containing dyes detached from the photoanodes also revealed
has revealed the presence of mesoporous structure with larger pore size
85.6 nmol cmÿ2, while for TNP film it was 51.6 nmol cmÿ2. This ob viously
leads to a greater photogenerated current density with use of G TNP as
compared to TNP.

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