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According to media reports, in the process of promoting solar energy into the international market, perovskite solar cells have shown great prospects. This battery uses a hole transport layer to promote efficient operation of currents exposed to sunlight. However, the organic materials from which the hole transport layer is made are expensive, and the materials lack long-term stability.
"Science" published a paper that a group of Chinese scientists led by Professor Han Hongwei and Professor Michael Gratzel of the Swiss University of Technology in Lausanne have developed a perovskite solar cell that does not use a hole transport layer at ambient temperature. Stable full light conditions with 12.8% conversion efficiency and over 1000 hours of stability. This innovative approach can reduce the cost of perovskite batteries and bring them to market more stably.
Mixed organic-inorganic lead halide lead perovskites have strong appeal to thin film solar photovoltaics, mainly due to their large attraction coefficient, high charge carrier mobility and long diffusion length. However, these batteries also cost a lot of money because of the hole transport layer, which requires high purity materials and complicated fabrication processes.
Photonics and interfaces laboratory Michael Grätzel Center of mesoscopic materials China Huazhong University of Science and a group of scientists from the University of Lausanne, Switzerland to cooperate, directly supervised by Professor Michael Grätzel, we have successfully developed without the use of a hole Transport layer of perovskite solar cells. The solar cell showed a comparison of energy conversion efficiency (12.8%) and proved to be stable under direct sunlight for more than 1000 hours.
Scientists create new solar cell, a dropping method need to use a coating solution as lead iodide, methyl iodide, 5-ammoniumvaleric acyl iodine through the porous carbon film. The solar cell holder is composed of two layers of titanium dioxide and zirconium dioxide, covered with a porous carbon film, and an amino acid template is used to promote perovskite nucleation and crystal growth in the pores.
In the future, perovskite solar cells can meet the growing demand for renewable resources. This groundbreaking innovation addresses a major limiting factor in the development of this cost-effective branch solar cell and paves the way for its development.
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