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000171693 0247_ $$2doi$$a10.1155/2014/249317
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000171693 1001_ $$0P:(DE-Juel1)156469$$aUrbain, F.$$b0$$eCorresponding Author$$ufzj
000171693 245__ $$aDevelopment of Thin Film Amorphous Silicon Tandem Junction Based Photocathodes Providing High Open-Circuit Voltages for Hydrogen Production
000171693 260__ $$aNew York, NY [u.a.]$$bHindawi Publ. Corp.$$c2014
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000171693 520__ $$aHydrogenated 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.
000171693 536__ $$0G:(DE-HGF)POF2-111$$a111 - Thin Film Photovoltaics (POF2-111)$$cPOF2-111$$fPOF II$$x0
000171693 536__ $$0G:(DE-Juel1)HITEC-20170406$$aHITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)$$cHITEC-20170406$$x1
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000171693 7001_ $$0P:(DE-Juel1)156395$$aWilken, K.$$b1$$ufzj
000171693 7001_ $$0P:(DE-Juel1)130297$$aSmirnov, V.$$b2$$ufzj
000171693 7001_ $$0P:(DE-Juel1)130212$$aAstakhov, O.$$b3$$ufzj
000171693 7001_ $$0P:(DE-Juel1)130263$$aLambertz, A.$$b4$$ufzj
000171693 7001_ $$0P:(DE-HGF)0$$aBecker, J.-P.$$b5
000171693 7001_ $$0P:(DE-Juel1)143905$$aRau, U.$$b6$$ufzj
000171693 7001_ $$0P:(DE-HGF)0$$aZiegler, J.$$b7
000171693 7001_ $$0P:(DE-HGF)0$$aKaiser, B.$$b8
000171693 7001_ $$0P:(DE-HGF)0$$aJaegermann, W.$$b9
000171693 7001_ $$0P:(DE-Juel1)130238$$aFinger, F.$$b10$$ufzj
000171693 773__ $$0PERI:(DE-600)2028941-8$$a10.1155/2014/249317$$gVol. 2014, p. 1 - 10$$nArticle ID 249317$$p1 - 10$$tInternational journal of photoenergy$$v2014$$x1687-529X$$y2014
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000171693 9141_ $$y2014
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