Efficiency Enhancement in ZnO:Al-Based Dye-Sensitized Solar Cells Structured with Sputtered TiO2 Blocking Layers

被引:29
作者
Alberti, A. [1 ]
Pellegrino, G. [1 ]
Condorelli, G. G. [2 ,3 ]
Bongiorno, C.
Morita, S. [4 ]
La Magna, A.
Miyasaka, T. [4 ]
机构
[1] CNR, IMM Zona Ind, I-95121 Catania, Italy
[2] Univ Catania, Catania, Italy
[3] INSTM UdR Catania, Catania, Italy
[4] Toin Univ Yokohama, Grad Sch Engn, Aoba Ku, Yokohama, Kanagawa 2258503, Japan
关键词
TEMPERATURE; ANATASE; FILMS; PERFORMANCE; RUTILE; ELECTRODES;
D O I
10.1021/jp411811q
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We explored new strategies for efficiency enhancement in dye-sensitized solar cells (DSSCs) by combining dehydration condensation reactions with sputtering deposition methods. The photoanodes were realized by means of low-temperature preparation of mesoporous TiO2 films on thin undoped TiO2 compact (blocking) layers on ZnO:Al (AZO) substrates and sensitization with ruthenium dye, N719. For photoanodes fabrication, an 8 mu m thick mesoporous film of TiO2 and an under critical thermal budget, applied before dye loading (<= 200 degrees C: i.e., 150 degrees C for the TiO2 mesoscopic layer and 200 degrees C for the TiO2 blocking/AZO bilayer), were employed, which renders the overall process competitive for the applications. The structural properties of the sputtered TiO2/AZO bilayer were optimized, and a cell efficiency as high as the 4.6%, above the current literature limit for AZO-based DSSC (3.8% for 10 mu m thick mesoporous layers sintered at 450 degrees C and sensitized with N719), was achieved at T <= 200 degrees C. With the proposed scheme for the photoanode structure and using, instead, a conventional thermal treatment at 500 degrees C (30 s), the cell efficiencies were further raised up to 4.9%. It was thus evidenced that the use of optimized materials for the cell architecture makes the AZO-based DSSC nowadays rising devices.
引用
收藏
页码:6576 / 6585
页数:10
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