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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Efficient and stable solid-state dye-sensitized solar cells based on a high-molar-extinction-coefficient sensitizer.
Mingkui Wang1, Soo-Jin Moon, Mingfei Xu
1Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, Lausanne, Switzerland.
Small (Weinheim an Der Bergstrasse, Germany)
|November 11, 2009
Summary
A novel ruthenium dye achieved a 4.6% power conversion efficiency in solid-state dye-sensitized solar cells (SSDSCs). These durable devices show promise for stable, low-cost solar energy generation.
Area of Science:
- Materials Science
- Photovoltaics
- Chemistry
Background:
- Development of efficient and stable solar cells is crucial for renewable energy.
- Solid-state dye-sensitized solar cells (SSDSCs) offer a promising alternative to traditional silicon-based photovoltaics.
- High-performance organic hole-transporting materials are essential for efficient charge extraction in SSDSCs.
Purpose of the Study:
- To synthesize and characterize a novel heteroleptic ruthenium dye for application in SSDSCs.
- To evaluate the photovoltaic performance and durability of SSDSCs incorporating the new ruthenium dye.
- To investigate the charge dynamics at the dye-sensitized heterojunction.
Main Methods:
- Fabrication of SSDSCs using a high-molar-extinction-coefficient heteroleptic ruthenium dye and spiro-MeOTAD.
- Power conversion efficiency (PCE) measurements under AM 1.5 solar simulation.
- Accelerated durability testing involving visible-light soaking at elevated temperatures.
- Impedance spectroscopy and transient photovoltage decay measurements to study recombination and charge collection.
Main Results:
- The synthesized ruthenium dye achieved a PCE of 4.6% in an SSDSC device.
- The SSDSCs demonstrated good durability, maintaining performance during 1000 hours of accelerated testing at 60°C.
- Electron recombination dynamics and charge collection efficiency were analyzed using electrochemical techniques.
Conclusions:
- The developed ruthenium dye is suitable for high-performance SSDSCs.
- SSDSCs utilizing this dye exhibit promising stability for practical applications.
- The study provides insights into charge transfer processes critical for optimizing photovoltaic device performance.
