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Enhancing the Efficiency of Dye Sensitized Solar Cells by Using Anatase and Brookite Mixed Phases of TiO2
Khan, M. I.; Shahnawaz; Imran, Shahid; Yousaf, Muhammad Waqas; Wahab, A.; Adil, F.; Majeed, Shahbaz; Khan, M. Fiaz; Aziz, Tariq
2019-11-01
Source PublicationJOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
ISSN1555-130X
Volume14Issue:11Pages:1582-1588
AbstractThe phases of TiO2 have an important role in the efficiency of dye sensitized solar cells (DSSCs). In this research, the effects of anatase and mixed phases (brookite and anatase) of TiO2 on the efficiency of DSSCs have been reported. 2% Cu doped TiO2 (Cu:TiO2) thin films are prepared by sol-gel dip coating technique. These films are annealed at the temperatures of "350 degrees C, 450 degrees C, 550 degrees C and 650 degrees C." XRD showed that at 550 degrees C and 650 degrees C, films have mixed phases of TiO2. Also, it showed that grain size is increased by increasing temperature. No extra phases of Cu like CuO etc. were observed in XRD graphs, which confirmed that Cu is completely dissolved into TiO2. UV-Vis results showed that all the films have more than 80% transmittance in the visible region. The optical band gap energy (E-g) of films at " 350 degrees C, 450 degrees C, 550 degrees C and 650 degrees C" is 3.96, 3.81, 3.75 and 3.64 eV, respectively. The electrical resistivity of these thin films by four point probe technique is calculated as 121.8 x 10(2) Omega-m, 95.69 x 10(2) Omega-m, 86.65 x 10(2) Omega-m and 76.3 x 10(2) Omega-m respectively. Solar simulator results showed that the current density (J(sc)) of mixed phase is higher than single phase, causing higher efficiency. The maximum J(sc) 5.12 mAcm(-2) is achieved at 650 degrees C (mixed phase), resulting in higher efficiency of 2.35% which is more than 100 times the efficiency of anatase phase which has 1.18%. This work will provide a way to enhance the efficiency of DSSCs by using mixed phases of TiO2. In future, if 1-D structure of these mixed phases is used in DSSCs then efficiency of DSSCs will improve definitely (or positively).
KeywordCu TiO2 Anatase Brookite DSSCs
Indexed BySCI
Language英语
WOS IDWOS:000491075000010
PublisherAMER SCIENTIFIC PUBLISHERS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80671
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Khan, M. I.,Shahnawaz,Imran, Shahid,et al. Enhancing the Efficiency of Dye Sensitized Solar Cells by Using Anatase and Brookite Mixed Phases of TiO2[J]. JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS,2019,14(11):1582-1588.
APA Khan, M. I..,Shahnawaz.,Imran, Shahid.,Yousaf, Muhammad Waqas.,Wahab, A..,...&Aziz, Tariq.(2019).Enhancing the Efficiency of Dye Sensitized Solar Cells by Using Anatase and Brookite Mixed Phases of TiO2.JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS,14(11),1582-1588.
MLA Khan, M. I.,et al."Enhancing the Efficiency of Dye Sensitized Solar Cells by Using Anatase and Brookite Mixed Phases of TiO2".JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS 14.11(2019):1582-1588.
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