共 35 条
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.
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页码:6576 / 6585
页数:10
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