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《第三届新型太阳能电池学术研讨会论文集》2016年
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Aqueous spray pyrolyzed ZnO as orientation induced buffer layer for Sb_2Se_3 photovoltaics of improved stability

【摘要】:One-dimensional ribbons and intrinsically benign grain boundaries promise antimony selenide(Sb_2Se_3) an appealing light absorber for photovoltaic applications.However,this peculiar property shows brilliance only when favorably oriented.Thus,a facile and straightforward method to control Sb_2Se_3 orientation is in urgent requirement.Here,we provide an easy to implement strategy for orientation control via quasi-epitaxial mechanism.Environmental-friendly material ZnO was used as buffer layer instead of toxic Cd S to induce Sb_2Se_3 growth orientation.The results indicate that the orientation of Sb_2Se_3 show strong correlation to the orientation of Zn O buffer layer.Even more amazing,the interface of ZnO[100]/Sb_2Se_3[221] with low interface state resulted in lowered recombination loss.The combination of high bulk transmission and low interface recombination synergistically boost a highest ZnO/Sb_2Se_3 device PCE 4.81% with impeccable devices stability.
【作者单位】:Wuhan National Laboratory for Optoelectronics (WNLO),Huazhong University of Science and Technology
【分类号】:O614.531
【正文快照】:
Figure(a)Current density–voltage(J–V)characteristics and(b)external quantum efficiency(EQE)spectra of Zn O/Sb2Se3 on r-Zn O and o-Zn O substrate.The top inset in panel b showed theEQE(-1V)/EQE(0V)raito for these two devices.EQE(-1V)represents EQE value

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