用于高沸点非化溶剂加工有机太阳能电池和模块的异质核剂
Haiyang Chen1, Weiwei Sun1, Rui Zhang2
1Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science Soochow University, Suzhou, 215123, China.
Advanced materials (Deerfield Beach, Fla.)
|March 30, 2024
概括
使用改性小分子接受器 (BTO-BO) 的新策略提高了有机太阳能电池 (OSC) 在环保溶剂中的性能. 这种方法可以改善核化,从而提高大面积设备的效率和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 高沸点的非化溶剂为大面积有机太阳能电池 (OSC) 提供了加工优势,但导致L8-BO等小分子受体的聚合问题,降低了效率.
- 控制分子聚合对于优化OSC活性层的形态和性能至关重要.
研究的目的:
- 开发一种新的策略,以克服小分子受体在高沸点非化溶剂中的聚合问题,用于OSC制造.
- 改善OSC活性层内的核化和结晶过程,以实现更高的功率转换效率 (PCE) 和运行稳定性.
主要方法:
- 将oligo ((乙烯基醇) 侧链移植到L8-BO上,以创建具有较低形成能量的修饰受体BTO-BO.
- 使用BTO-BO作为活性层混合物 (PM6:L8-BO) 中的异质核化剂,以促进受控结晶.
- 研究BTO-BO和L8-BO之间强键相互作用对核化密度和相分离的影响.
主要成果:
- BTO-BO显著增加核化密度,导致抑制过度聚合和理想的相隔形态,具有小域大小和高晶度.
- 使用这种策略的托卢加工OSC实现了创纪录的PCE19.42% (认证为19.12%) 与增强的操作稳定性.
- 该方法证明了可扩展性,产生了15.03厘米2模块,PCE记录为16.35% (认证为15.97%).
结论:
- 使用BTO-BO的异质核化剂策略有效控制分子聚合,并改善使用高沸点非化溶剂加工的OSC中的活性层形态.
- 这种方法为制造高效,稳定和大面积的有机太阳能电池使用环保溶剂提供了可行的途径.
相关概念视频
01:12Solvents
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A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
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02:56Intermolecular Forces and Physical Properties
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02:41Formation of Halohydrin from Alkenes
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An alkene, such as propene, reacts with bromine in the presence of water to yield a halohydrin. Halohydrins contain a halogen and a hydroxyl group attached to adjacent carbons. When the halogen is bromine, it is called a bromohydrin, while a chlorohydrin has chlorine as the halogen.
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02:34Nucleophilic Substitution Reactions
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Historical perspective
In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a series of reactions. This conversion suggested the involvement of optical inversion during the substitution reaction. Further, in 1930, Sir Christopher Ingold described for the first time two different forms of nucleophilic substitution reactions, which are known as SN1 (nucleophilic substitution unimolecular) and SN2 (nucleophilic substitution...
In 1896, the German chemist Paul Walden discovered that he could interconvert pure enantiomeric (+) and (-) malic acids through a series of reactions. This conversion suggested the involvement of optical inversion during the substitution reaction. Further, in 1930, Sir Christopher Ingold described for the first time two different forms of nucleophilic substitution reactions, which are known as SN1 (nucleophilic substitution unimolecular) and SN2 (nucleophilic substitution...
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02:45Alkyl Halides
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Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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02:46Halogenation of Alkenes
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Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
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