Home > Publications database > Development of Thin Film Amorphous Silicon Tandem Junction Based Photocathodes Providing High Open-Circuit Voltages for Hydrogen Production > print

001     171693
005     20240712084528.0
024 7 _ |a 10.1155/2014/249317
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024 7 _ |a 1110-662X
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024 7 _ |a 1687-529X
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024 7 _ |a 2128/8021
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024 7 _ |a WOS:000339792500001
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037 _ _ |a FZJ-2014-05263
082 _ _ |a 540
100 1 _ |a Urbain, F.
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245 _ _ |a Development of Thin Film Amorphous Silicon Tandem Junction Based Photocathodes Providing High Open-Circuit Voltages for Hydrogen Production
260 _ _ |a New York, NY [u.a.]
|c 2014
|b Hindawi Publ. Corp.
336 7 _ |a Journal Article
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520 _ _ |a Hydrogenated amorphous silicon thin film tandem solar cells (a-Si:H/a-Si:H) have been developed with focus on high open-circuit voltages for the direct application as photocathodes in photoelectrochemical water splitting devices. By temperature variation during deposition of the intrinsic a-Si:H absorber layers the band gap energy of a-Si:H absorber layers, correlating with the hydrogen content of the material, can be adjusted and combined in a way that a-Si:H/a-Si:H tandem solar cells provide open-circuit voltages up to 1.87 V. The applicability of the tandem solar cells as photocathodes was investigated in a photoelectrochemical cell (PEC) measurement set-up. With platinum as a catalyst, the a-Si:H/a-Si:H based photocathodes exhibit a high photocurrent onset potential of 1.76 V versus the reversible hydrogen electrode (RHE) and a photocurrent of 5.3 mA/cm2 at 0 V versus RHE (under halogen lamp illumination). Our results provide evidence that a direct application of thin film silicon based photocathodes fulfills the main thermodynamic requirements to generate hydrogen. Furthermore, the presented approach may provide an efficient and low-cost route to solar hydrogen production.
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|a HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)
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700 1 _ |a Wilken, K.
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700 1 _ |a Smirnov, V.
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700 1 _ |a Astakhov, O.
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700 1 _ |a Lambertz, A.
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700 1 _ |a Becker, J.-P.
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700 1 _ |a Rau, U.
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700 1 _ |a Ziegler, J.
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700 1 _ |a Kaiser, B.
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700 1 _ |a Jaegermann, W.
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700 1 _ |a Finger, F.
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773 _ _ |a 10.1155/2014/249317
|g Vol. 2014, p. 1 - 10
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|t International journal of photoenergy
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