Small molecule semiconductors for high-efficiency organic photovoltaics

被引:1621
作者
Lin, Yuze [1 ,2 ,3 ]
Li, Yongfang [1 ,2 ]
Zhan, Xiaowei [1 ,2 ]
机构
[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
关键词
HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; INTERNAL CHARGE-TRANSFER; PI-CONJUGATED SYSTEMS; TITANYL PHTHALOCYANINE/C-60 HETEROJUNCTIONS; POWER CONVERSION EFFICIENCY; ELECTRON-ACCEPTOR MATERIALS; THIOPHENE-BASED OLIGOMERS; FIELD-EFFECT TRANSISTORS; LOW-BAND-GAP;
D O I
10.1039/c2cs15313k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Organic photovoltaic cells (OPVs) are a promising cost-effective alternative to silicon-based solar cells, and possess light-weight, low-cost, and flexibility advantages. Significant progress has been achieved in the development of novel photovoltaic materials and device structures in the last decade. Nowadays small molecular semiconductors for OPVs have attracted considerable attention, due to their advantages over their polymer counterparts, including well-defined molecular structure, definite molecular weight, and high purity without batch to batch variations. The highest power conversion efficiencies of OPVs based on small molecular donor/fullerene acceptors or polymeric donor/fullerene acceptors are up to 6.7% and 8.3%, respectively, and meanwhile nonfullerene acceptors have also exhibited some promising results. In this review we summarize the developments in small molecular donors, acceptors (fullerene derivatives and nonfullerene molecules), and donor-acceptor dyad systems for high-performance multilayer, bulk heterojunction, and single-component OPVs. We focus on correlations of molecular chemical structures with properties, such as absorption, energy levels, charge mobilities, and photovoltaic performances. This structure-property relationship analysis may guide rational structural design and evaluation of photovoltaic materials (253 references).
引用
收藏
页码:4245 / 4272
页数:28
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