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Dual Functional Electron-Selective Contacts Based on Silicon Oxide/Magnesium: Tailoring Heterointerface Band Structures while Maintaining Surface Passivation
Tong, Hui; Yang, Zhenhai; Wang, Xixi; Liu, Zhaolang; Chen, Zhenxin; Ke, Xiaoxing; Sui, Manling; Tang, Jiang; Yu, Tianbao; Ge, Ziyi; Zeng, Yuheng; Gao, Pingqi; Ye, Jichun
2018
发表期刊ADVANCED ENERGY MATERIALS
卷号8期号:16
摘要Silicon (Si)-based dopant-free heterojunction solar cells (SCs) featuring carrier-selective contacts (CSCs) have attracted considerable interest due to the extreme simplifications in their device structure and manufacturing procedure. However, these SCs are limited by the unsatisfactory contact properties on both sides of the junction, and their efficiencies are not comparable with those of commercially available Si SCs. In this report, a high-performance silicon-oxide/magnesium (SiOx/Mg) electron-selective contact (ESC) design is described. Combining an ultrathin SiOx and a low work function Mg layer, the novel ESC simultaneously yields low recombinative and resistive losses. In addition, deposition of Mg on SiOx relaxes the restriction on the threshold thickness of the SiOx for electron tunneling and therefore broadens the optimization space for rear-sided passivation. Meanwhile, hole-selective contact with boosted light harvesting and suppressed interfacial recombination is achieved by forming a fully conformal contact between the conducting poly(3,4-ethylene dioxythiophene): poly(styrenesulfonate) (PEDOT: PSS) and periodic Si pyramid arrays. With the double-sided carrier-selective contact designs, PEDOT: PSS/Si/SiOx/MgSCs with efficiency of 15% are finally obtained via a totally dopant-free processing. Subsequent calculations further indicate a pathway for the improvement of these contacts toward an efficiency that is competitive with conventionally diffused pn junction SCs.
关键词Heterojunction Solar-cells Transition-metal Oxides Performance Layer Moox
学科领域Chemistry ; Crystallography ; Materials Science
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/17417
专题2018专题
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GB/T 7714
Tong, Hui,Yang, Zhenhai,Wang, Xixi,et al. Dual Functional Electron-Selective Contacts Based on Silicon Oxide/Magnesium: Tailoring Heterointerface Band Structures while Maintaining Surface Passivation[J]. ADVANCED ENERGY MATERIALS,2018,8(16).
APA Tong, Hui.,Yang, Zhenhai.,Wang, Xixi.,Liu, Zhaolang.,Chen, Zhenxin.,...&Ye, Jichun.(2018).Dual Functional Electron-Selective Contacts Based on Silicon Oxide/Magnesium: Tailoring Heterointerface Band Structures while Maintaining Surface Passivation.ADVANCED ENERGY MATERIALS,8(16).
MLA Tong, Hui,et al."Dual Functional Electron-Selective Contacts Based on Silicon Oxide/Magnesium: Tailoring Heterointerface Band Structures while Maintaining Surface Passivation".ADVANCED ENERGY MATERIALS 8.16(2018).
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