Sticky interconnect for solution-processed tandem solar cells.
Sticky interconnect for solution-processed tandem solar cells.
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DOI：
10.1021/ja203464n
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发表时间：
2011-06
影响因子：
15
通讯作者：
V. Tung;Jaemyung Kim;Laura J. Cote;Jiaxing Huang
中科院分区：
文献类型：
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作者：
V. Tung;Jaemyung Kim;Laura J. Cote;Jiaxing Huang
氧化石墨烯（GO）可以被视为具有分布的纳米尺寸石墨片和高度氧化域的二维无规二嵌段共聚物，因此能够通过π-π堆叠和氢键引导其他材料的组装。在将GO和导电聚合物聚（3，4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）在水中混合后，获得具有显著增加的粘度的分散体，其在流延时变成粘性薄膜。令人惊讶的是，绝缘GO通过改变其链构象和形态使PEDOT更具导电性。GO/PEDOT凝胶可以用作无金属焊料，用于在有机光电器件中产生机械和电连接。作为概念验证，聚合物叠层太阳能电池已经通过由粘性GO/PEDOT膜实现的直接粘合剂层压工艺制造。粘性互连可以极大地简化有机串联架构的制造，这通过溶液处理是相当具有挑战性的。因此，它可以促进高效率的串联太阳能电池的结构与不同组合的溶液加工材料。
Graphene oxide (GO) can be viewed as a two-dimensional, random diblock copolymer with distributed nanosize graphitic patches and highly oxidized domains, thus capable of guiding the assembly of other materials through both π-π stacking and hydrogen bonding. Upon mixing GO and conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in water, a dispersion with dramatically increased viscosity is obtained, which turns into sticky thin films upon casting. Surprisingly, the insulating GO makes PEDOT much more conductive by altering its chain conformation and morphology. The GO/PEDOT gel can function as a metal-free solder for creating mechanical and electrical connections in organic optoelectronic devices. As a proof-of-concept, polymer tandem solar cells have been fabricated by a direct adhesive lamination process enabled by the sticky GO/PEDOT film. The sticky interconnect can greatly simplify the fabrication of organic tandem architectures, which has been quite challenging via solution processing. Thus, it could facilitate the construction of high-efficiency tandem solar cells with different combinations of solution-processable materials.