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Small molecule semiconductors for high-efficiency organic photovoltaics
Yuze Lin1, Yongfang Li, Xiaowei Zhan
1Beijing National Laboratory for Molecular Sciences and Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Chemical Society Reviews
|March 29, 2012
Summary
Small molecular organic photovoltaic cells (OPVs) offer cost-effective, lightweight solar energy solutions. This review details advancements in small molecule donors and acceptors, guiding future high-performance OPV material design.
Area of Science:
- Materials Science
- Organic Electronics
- Renewable Energy
Background:
- Organic photovoltaic cells (OPVs) present a cost-effective, flexible alternative to silicon solar cells.
- Small molecular semiconductors are gaining traction in OPVs due to their structural advantages over polymers.
- Recent progress has focused on novel materials and device architectures for enhanced performance.
Purpose of the Study:
- To review developments in small molecular donors, acceptors, and dyad systems for OPVs.
- To analyze structure-property relationships in photovoltaic materials.
- To guide the rational design of next-generation OPV materials.
Main Methods:
- Comprehensive literature review of small molecular OPVs.
- Analysis of structure-property correlations (absorption, energy levels, charge mobility).
- Focus on high-performance multilayer, bulk heterojunction, and single-component OPVs.
Main Results:
- Small molecular donors and acceptors, including fullerene derivatives and nonfullerene molecules, show significant promise.
- Power conversion efficiencies reach up to 6.7% for small molecular donor/fullerene acceptor and 8.3% for polymeric donor/fullerene acceptor systems.
- Non-fullerene acceptors are emerging as competitive alternatives.
Conclusions:
- Understanding structure-property relationships is crucial for advancing OPV performance.
- Small molecular materials offer a pathway to high-efficiency, low-cost organic solar cells.
- This review provides insights for the rational design and evaluation of new photovoltaic materials.
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