One of the current greatest technological challenges is to develop renewable technology that will sustain the needs of humankind for energy generation and production. However, due to the ever-increasing demand for energy, there’s been an energy crisis where the demand has exceeded the supply. As I am currently studying a programme that focuses on the renewable energy, I came across a technology called bio-Solar cells and I would like to share some of my impressions with you!
What is a bio-solar cell?
Bio-solar cells use photosynthetic organisms to produce bioelectricity. I find this highly interesting because electricity generation is possible through photosynthesis from microorganisms such as Cyanobacteria to even Spinach leaves! These reactions involve the generation and release of electrons which flow through an external circuit to produce electricity.
Sunlight aids the process of photosynthesis in plants/microorganisms to produce electricity
Why are bio-solar cells advantageous?
The benefits of this technology are quite significant. For instance, this technology is cost-effective compared to semiconductor-based renewable technologies. It involves components that are bio-compatible, have low toxicity and even chemical stability. However, the most important benefit is that this technology can transfer more electrons for better conversion of energy. In addition, there are small gas spaces formed between each unit cell. These gas spaces create a self-sustainable environment using photosynthesis for durable performance [1].
Limitations of bio-solar cells
As much as I find this technology to be interesting, there are still a few limitations that are yet to be overcome. Since these technologies are dependent on microorganisms, the energy produced is less because the voltage and current produced are also less. Therehas been a significant research conducted to improve this technology. One such solution is to stack multiple unit cells together to increase the energy production. Research to overcome these limitations is still underway [2].
Is there hope?
The transcending of technology with processes that mimic nature such as photosynthesis and respiration is a marvellous feat. Yet, there are still developments that need to be made. Their efficiencies are still not high enough for commercialisation. More tests are still needed to ensure long-term stability and durability. Despite these uncertainties, these technologies show potential, especially in terms of powering low-power applications! I am certain that we will see a performance boost of these bio-solar cells that will redefine how we see sustainability!
The role of innovation in sustainable energy
Technologies such as the bio-solar cells are only possible because of the amount of innovation that is being developed in the energy sector. Programmes like the Master’s in Energy Storage – which I am currently following – prepare engineers to lead new developments and find solutions to the most pressing challenges in the energy mix. Are you looking for a career where you can make an impact with new ideas? Then sustainable energy is definitely the path for you.
References:
[1] M. Rasmussen, A. Wingersky and S.D. Minteer, “Improved Performance of a Thylakoid Bio-Solar Cell by Incorporation of Carbon Quantum Dots”, ECS Electrochemistry Letters, 3(2), 2013.
[2] X. Wei, H. Lee and S. Choi, “Bio-power generation in a microfluidic bio-solar panel”, Sensors and Actuators B: Chemical, vol. 228, pp. 151–155. 2016.
By Sharon Santhosh, EIT InnoEnergy Master’s in Energy Storage Student