Hong Kong Polytechnic University develops new translucent solar cells

Hong Kong Polytechnic University develops new translucent solar cells

Yan Feng, associate professor of applied physics at Hong Kong Polytechnic University, holds the "graphene perovskite translucent solar cell." Photo courtesy Ming Pao / The Hong Kong Polytechnic University

According to Hong Kong's "Ming Pao" report, the Hong Kong Polytechnic University has developed a new translucent solar cell with an efficiency of converting 12% of light energy into electricity, which is 7% higher than that of traditional translucent solar cells, and costs less than HK$0.5 per watt of electricity generated. , More than 50% lower than existing solar silicon battery.

Yan Feng, associate professor of applied physics at the Hong Kong Polytechnic University responsible for the study, said that the first-generation crystalline silicon solar cells have stable performance and high conversion efficiency, but they are expensive and opaque. The second-generation thin-film solar cells require rare raw materials. It is manufactured with complex structure and needs to be handled in a high temperature environment.

Yan Feng pointed out that researchers from Hong Kong Polytechnic University used translucent, highly conductive, low-cost material graphene and perovskite as electrodes to develop new translucent solar cells with an average energy conversion efficiency of 12%.

Yan Feng said that based on its semi-transparent nature, solar cells can absorb light from both sides, and are suitable for windows, exterior walls, etc. of buildings, greatly increasing the area for absorbing energy and converting more solar energy into electricity.

He said that translucent perovskite solar cells are low in cost and can be mass-produced by printing or roll-to-roll methods, helping to fill the market demand that existing solar cells have not met. The results of this study have been published in the Advanced Materials Materials Science Journal.

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