Achieving a Record Fill Factor for Silicon–Organic Hybrid Heterojunction Solar Cells by Using a Full‐Area Metal Polymer Nanocomposite Top Electrode,Advanced Functional Materials

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Achieving a Record Fill Factor for Silicon–Organic Hybrid Heterojunction Solar Cells by Using a Full‐Area Metal Polymer Nanocomposite Top Electrode
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-01-15 , DOI: 10.1002/adfm.201705425
Juye Zhu _{1,

2} , Xi Yang ₁ , Zhenhai Yang ₁ , Dan Wang ₁ , Pingqi Gao ₁ , Jichun Ye ₁

Affiliation

Carrier collection in conventional n‐type Si (n‐Si)/organic hybrid heterojunction solar cells (HHSCs) is mainly limited by the nonoptimized top grid‐electrode and inadequate work function (WF) of the PH1000‐type poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Here, a novel modified metal polymer nanocomposite top electrode (M‐MPNTE) is designed to achieve a full‐area carrier collection in n‐Si/PEDOT:PSS HHSCs. The carrier collection in both lateral and vertical directions is significantly improved by the introduction of an ultrathin Au/MoO_x modified layer between 6 nm ultrathin Ag film and AI4083‐type PEDOT:PSS layer. In addition, the carrier separation is boosted by the enhanced built‐in potential owing to a high WF of M‐MPNTE, which also suppresses the carrier recombination at the surface of n‐Si. Due to these collaborative improvements, a record fill factor of 80.21% is obtained, which is even comparable to the best value of the traditional Si‐based solar cells. With the addition of a MoO_x antireflective coating layer on top of M‐MPNTE, the short‐circuit current density and open‐circuit voltage are finally increased to 23.13 mA cm⁻² and 621.07 mV, respectively, yielding a power conversion efficiency of 10.82%. The finding suggests a novel strategy for the development of highly efficient HHSCs with ideal carrier transport mechanism.

中文翻译：

通过使用全面积金属聚合物纳米复合材料顶电极实现硅-有机混合异质结太阳能电池的填充因子记录

常规n型Si（n-Si）/有机混合异质结太阳能电池（HHSC）中的载流子收集主要受PH1000型聚（3,4-乙二氧基噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）。在这里，设计了一种新型的改性金属聚合物纳米复合材料顶部电极（M-MPNTE），以实现n-Si / PEDOT：PSS HHSC中的全面积载流子收集。通过引入超薄Au / MoO _x可以显着改善横向和垂直方向上的载流子收集6 nm超薄银膜与AI4083型PEDOT：PSS层之间的改性层。此外，由于M-MPNTE的高WF，内建电位提高了载流子分离，这也抑制了n-Si表面的载流子复合。由于这些协同改进，填充率达到了创纪录的80.21％，甚至可以与传统硅基太阳能电池的最高价值相媲美。在M‐MPNTE的顶部添加MoO _x减反射涂层后，短路电流密度和开路电压最终增加到23.13 mA cm ^-2和621.07 mV，分别产生10.82％的功率转换效率。该发现为开发具有理想载流子传输机制的高效HHSC提供了一种新颖的策略。

更新日期：2018-01-15

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