Abstract: . . .  MPP, measured at 0.7 sun equivalent, of a P3OT:TiO2 BHJ photovoltaic cell (10 vol.% TiO2) vs. the time elapsed after preparation of the cell. 4. Conclusions A new, simple procedure is reported for preparing hybrid TiO2:polymer photovoltaic cells, in which a continuous interpenetrating network of TiO2 is created inside a thin conjugated polymer film. I–V measurements on MDMO-PPV:TiO2 BHJ show an increase in Isc with . . .
. . .  the device stability. After the initial increase in performance, the EQE was measured and is shown in Fig. 2 (right) for a 10 vol.% P3OT:TiO2 BHJ cell and a 20 vol.% MDMOPPV:TiO2 BHJ cell. The TiO2 concentration in these devices was chosen to give the highest power conversion efficiency. The EQE spectra are similar to the absorbance spectra, showing that the polymer is the photoactive material in these cells. The . . .
. . .  measured at 0.7 sun equivalent, of a P3OT:TiO2 BHJ photovoltaic cell (10 vol.% TiO2) vs. the time elapsed after preparation of the cell. 4. Conclusions A new, simple procedure is reported for preparing hybrid TiO2:polymer photovoltaic cells, in which a continuous interpenetrating network of TiO2 is created inside a thin conjugated polymer film. I–V measurements on MDMO-PPV:TiO2 BHJ show an increase in Isc with increasing . . .
. . .  of EQE measurements at the maximum performance, the maximum AM1.5 power conversion efficiency is calculated to be 0.22% for the PPV:TiO2 BHJ photovoltaic cell (20 vol.% TiO2) and 0.17% for the P3OT:TiO2 BHJ photovoltaic cell (10 vol.% TiO2). Acknowledgments This work was done with financial support of the Dutch Polymer Institute (DPI). Marijke Roos (ECN) is acknowledged for taking the SEM images. References w1x T.J. . . .
. . .  concentration in these devices was chosen to give the highest power conversion efficiency. The EQE spectra are similar to the absorbance spectra, showing that the polymer is the photoactive material in these cells. The maximum EQE is 0.13 for MDMO-PPV at a wavelength of 474 nm and 0.10 for P3OT at a wavelength of 480 nm. Taking the integral of the overlap of these EQE spectra with the AM1.5 spectrum, normalised at . . .
. . .  as well as EQE measurements of photovoltaic cells consisting of a MDMO-PPV:TiO2 BHJ or a poly(3-octyl thiophene):TiO2 (P3OT:TiO2) BHJ with varying polymer:TiO2 ratios. 2. Experimental Photovoltaic cells were made by spincoating a 75nm-thick film of electroluminescence-grade poly(3,4- 2003 Elsevier B.V. All rights reserved. L.H. Slooff et al. / Thin Solid Films 451 – 452 (2004) 634–638 635 Fig. 1. Scanning electron . . .
. . .  403 (2002) 223. w3x P.A. van Hal, M.M. Wienk, J.M. Kroon, W.J.H. Verhees, L.H. Slooff, W.J.H. van Gennip, P. Jonkheijm, R.A.J. Jansen, Adv. Mat. 15 (2003) 118. w4x S.E. Shaheen, C.J. Brabec, F. Padinger, P. Fromherz, J.C. Hummelen, N.S. Sariciftci, Appl. Phys. Lett. 78 (2001) 841.  . . .
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