Structural control of organic solar cells based on nonplanar metallophthalocyanine/C60 heterojunctions using organic buffer layers
Structural control of organic solar cells based on nonplanar metallophthalocyanine/C60 heterojunctions using organic buffer layers
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DOI：
10.1016/j.orgel.2011.03.016
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发表时间：
2011-06
影响因子：
3.2
通讯作者：
T. Sakurai;T. Ohashi;Hikaru Kitazume;M. Kubota;T. Suemasu;K. Akimoto
中科院分区：
文献类型：
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作者：
T. Sakurai;T. Ohashi;Hikaru Kitazume;M. Kubota;T. Suemasu;K. Akimoto
研究了具有有机缓冲层的PbPC基太阳电池的结构、光学和电学性能的系统变化。当缓冲层改变时，观察到PBPC晶体由单斜相向三斜相转变。生长在六硫杂环戊烯(6T)缓冲层上的三斜相PBPC的结构性能优于生长在其他有机衬底上的PBPC。由于有机层的晶体生长是由有机异质界面上的各向异性分子间相互作用主导的，高度取向的6T缓冲层具有原子平坦的形貌，促进了有序的PBPC层的生长。有机太阳能电池的性能与PBPC单层的结构和电学性质直接相关。三斜相的形成增强了OSCs在890 nm附近的光谱灵敏度，表明OSCs的电流密度增强。因此，采用合适的有机缓冲层对PBPC层的晶体质量和晶相进行控制是提高OSCs器件性能的有效途径。
The systematic variations in structural, optical and electrical properties of lead phthalocyanine (PbPc)-based solar cells with organic buffer layers were investigated. Transition of the PbPc crystal from a monoclinic phase to a triclinic one was observed when the buffer layers were changed. The structural properties of triclinic PbPc grown on the sexithiophene (6T) buffer layer was superior to those of PbPc grown on the other organic substrates. Since the crystal growth of organic layers is dominated by the anisotropic intermolecular interactions at organic hetero-interfaces, the highly oriented 6T buffer layer with the atomically flat morphology promotes the growth of well-ordered PbPc layers. The performance of the organic solar cells (OSCs) was in direct correlation with the structural and electrical properties of the PbPc single layers. The formation of the triclinic phase enhances the spectrum sensitivity at around 890 nm, suggesting the enhancement of the current density of OSCs. Thus, the control of both crystal quality and phase of PbPc layers using a proper organic buffer layer is effective in enhancing the device performance of OSCs.