Indoor solar panels to power your gadgets? A team just proved it can be done safely


University of Queensland researchers have developed indoor solar panels that could one day power your wearables, sensors, and small electronics using nothing but the light already in your home or office.

The panels are based on perovskite, a material that has been gaining attention as a successor to traditional silicon in solar cells. While silicon-based indoor solar cells top out at around 10 percent efficiency, perovskite can do significantly better. 

The catch has always been that most perovskite solar cells rely on lead and hazardous solvents in their production, which is a problem for both safety and scaling up to real-world manufacturing. The UQ team has figured out a way around that.

So how does it actually work?

PhD student Zitong Wang, under the supervision of Dr Miaoqiang Lyu and Professor Lianzhou Wang, developed a vapor-based process that can manufacture high-quality lead-free perovskite material without any hazardous solvents. 

The panels hit a power conversion efficiency of 16.36 percent under indoor lighting, which is the highest recorded for this type of lead-free perovskite indoor solar cell made using an industry-compatible method.

Could these replace the batteries in your gadgets?

The panels are being explored as an alternative to coin-cell and button batteries for low-power devices like environmental sensors, wearables, and health monitors. Supermarkets testing electronic shelf labels, which replace paper price tags, are among the early candidates for the technology.

The panels are thin, flexible, and can be made in different shapes, making them easy to slot into all kinds of products. The next step is encapsulation to protect them from moisture and oxygen. After that, it is mostly a waiting game.

Dr Lyu expects perovskite indoor panels to hit the consumer market within the next few years. This is an exciting new technological development that could significantly benefit the environment. I look forward to seeing how it evolves and improves our lives.



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