Enhancing performance of P3HT:TiO₂ solar cells using doped and surface modified TiO₂ nanorods.
Here we demonstrated an approach to increase performance of P3HT:TiO2 solar cell either by electron deficient boron or electron rich bismuth doping into TiO2 nanorods. The B doping increases the absorption, crystallinity and electron mobility of TiO2 nanorods. The Bi-doped TiO2 has higher J(sc) as compared with B-doped TiO2, mainly due to the improvement of electron density and increased absorption of TiO2 nanorods. The devices were fabricated from TiO2 nanorods being surface modified by organic dye W-4. The dye facilitates the bandgap alignment and compatibility between TiO2 and P3HT. The power conversion efficiency of solar cell has been increased by 1.33 times and 1.30 times for Bi-doped TiO2 and B-doped TiO2, respectively, as compared with that of as-synthesized TiO2. The results suggest the optical and electronic properties of TiO2 can be tuned by various dopants to enhance the device performance.
No. 1, Sec. 4, Roosevelt Road, Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
Yu-Chieh
YC
Tu
No. 1, Sec. 4, Roosevelt Road, Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
Herman
H
Lim
No. 1, Sec. 4, Roosevelt Road, Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
Chun-Yu
CY
Chang
No. 1, Sec. 4, Roosevelt Road, Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan; No. 128, Sec. 2, Academia Road, Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
Jing-Jong
JJ
Shyue
No. 1, Sec. 4, Roosevelt Road, Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan. Electronic address: suwf@ntu.edu.tw.
Wei-Fang
WF
Su
Doping; Nanorods; P3HT; Polymer; Solar cell; TiO(2)