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Enhanced photocathodic behaviors of Pb(Zr0.20Ti0.8

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标题:Enhanced photocathodic behaviors of Pb(Zr0.20Ti0.80)O3 films
on Si substrates for hydrogen production

 

作者 Xiaorong Cheng, Wen Dong, Fengang Zheng, Liang Fang, and Mingrong Shen

 

论文摘要:Wide bandgap ferroelectric Pb(Zr0.20Ti0.80)O3 films were deposited on indium tin oxide (ITO)
coated Si-pn
þ substrates with an intention to form efficient Si-pnþ/ITO/Pb(Zr,Ti)O3 (PZT)
photocathode for hydrogen production. Depolarization electric field generated in PZT film due to
poling can drive the photogenerated electrons from Si-pn
þ junction to PZT film, resulting in
enhanced photoelectrochemical activity of the photocathode. Comparing the electrode with asprepared PZT film, the photocurrent increased from 100
lA cm2 to 1.2 mA cm2 at 0V vs. reversible hydrogen electrode (RHE) and the onset potential from 0.36 V to 0.7 V vs. RHE under 100
mW cm
2 illumination, manifesting the great advantage of depolarization electric field in driving
the photogenerated carriers not only in the ferroelectric film but also on the interface of different
semiconductors.

 

原文链接:http://dx.doi.org/10.1063/1.4922733


 

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