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Organic Solar Cell New Breakthough

Author: Source: Datetime: 2017-01-04 14:11:45
Recently, the Nankai University School of Chemistry, Professor Chen Yongsheng team in the field of organic solar cells to achieve a breakthrough in the field of research. They used a complementary light-absorbing strategy of oligomeric materials to construct a laminated organic solar cell with a broad spectral absorption characteristic, achieving a photoelectric conversion efficiency of 12.7%, which is reported in the literature organic / polymer solar cell photoelectric conversion The highest efficiency record.

December 5, introduced the results of research papers published in the international top academic journal "Nature Photonics" (Nature Photonics) on.
Organic Solar Cell New Breakthough
Organic solar cells to photosensitive properties of organic, including polymer materials as a semiconductor material, through the photovoltaic effect of voltage, and then the formation of current, to achieve solar powered portable generator power generation. As an effective way to solve environmental pollution and energy crisis, it is far superior to traditional solar cells in terms of low cost, high flexibility, simple process and environment friendliness.

However, since 1958 the first organic solar cell device has been born, how to improve the photoelectric conversion efficiency is always plagued the key problems of scientists. This issue also directly determines whether the organic solar cells out of the laboratory, widely used in human production and life.

"As a new frontier research field, in recent years, the organic solar power generator cell energy conversion efficiency of the substantial increase in the main benefit from the photoactive layer material design and development and device structure optimization." Chen Yongsheng said.

Over the years, Chen Yongsheng team of organic photovoltaic device material selection and construction process conducted in-depth study systematically, developed a series of highly efficient solution of oligomer molecular active layer materials, and in 2015 received more than 10% Photoelectric conversion efficiency (J. Am. Chem. Soc., 2015, 137, 3886-3893.).

Considering the requirements of industrialization, the use of active materials with different spectral absorption range to prepare laminated photovoltaic devices is one of the effective strategies to further improve the photoelectric conversion efficiency. Based on this idea, the team of researchers used oligomeric molecules / polymers as the front and back cell, respectively, to obtain a stacked organic photovoltaic device with an energy conversion efficiency of more than 11% (Adv. Mater., 2016, 28, 7008-7012. .

Recently, Chen Yongsheng team and the South China University of Technology research team, in the visible and near infrared region has a good complementary absorption of BDT oligomeric molecules and porphyrin small molecular materials as the former battery and the battery after the donor material, And industrial production compatible with the solution processing methods have been prepared highly efficient organic solar devices. After a process optimization, a final validation efficiency of 12.7% (Nature Photon., 2016, published online.) Was achieved.

The team researchers, according to the relevant design principles, through the further optimization of materials and devices, the device's indicators, including photoelectric conversion efficiency there is a big room for improvement. Is expected in the near future, is expected to get more than 15% of the photoelectric conversion efficiency.

"The next step, we will mainly solve the problem of battery life and further improve the efficiency of energy conversion.I believe that organic solar cells from the laboratory to the real application, the realization of commercial production of the dream in the near future will become a reality," said Chen Yongsheng.
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