Jun 182017
 

Thermal images are taken by an infrared camera to compare the heat rejection performance of automobile window film, semi-transparent solar cell and glass.
Copyright : Korea Advanced Institute of Science and Technology (KAIST)

A Korean research team has developed semi-transparent perovskite solar cells that could be great candidates for solar windows.

Scientists are exploring ways to develop transparent or semi-transparent solar cells as a substitute for glass walls in modern buildings with the aim of harnessing solar energy. But this has proven challenging, because transparency in solar cells reduces their efficiency in absorbing the sunlight they need to generate electricity.

Typical solar cells today are made of crystalline silicon, which is difficult to make translucent. By contrast, semi-transparent solar cells use, for example, organic or dye-sensitized materials. But compared to crystalline silicon-based cells, their power-conversion efficiencies are relatively low. Perovskites are hybrid organic-inorganic photovoltaic materials, which are cheap to produce and easy to manufacture. They have recently received much attention, as the efficiency of perovskite solar cells has rapidly increased to the level of silicon technologies in the past few years.

Using perovskites, a Korean research team, led by Professor Seunghyup Yoo of the Korea Advanced Institute of Science and Technology and Professor Nam-Gyu Park of Sungkyunkwan University, has developed a semi-transparent solar cell that is highly efficient and functions very effectively as a thermal mirror.

One key to achieving efficient semitransparent solar cells is to develop a transparent electrode for the cell’s uppermost layer that is compatible with the photoactive material. The Korean team developed a ‘top transparent electrode’ (TTE) that works well with perovskite solar cells. The TTE is based on a multilayer stack consisting of a metal film sandwiched between a high refractive index layer and an interfacial buffer layer. This TTE, placed as a solar cell’s top-most layer, can be prepared without damaging ingredients used in the development f perovskite solar cells. Unlike conventional transparent electrodes that only transmit visible light, the team’s TTE plays the dual role of allowing visible light to pass through while at the same time reflecting infrared rays.

The semi-transparent solar cells made with the TTEs exhibited an average power conversion efficiency as high as 13.3%, reflecting 85.5% of incoming infrared light. Currently available crystalline silicon solar cells have up to 25% efficiency but are opaque.

The team believes that if the semi-transparent perovskite solar cells are scaled up for practical applications, they can be used in solar windows for buildings and automobiles, which not only generate electrical energy but also allow smart heat management in indoor environments, thereby utilizing solar energy more efficiently and effectively.

Learn more: Harnessing energy from glass walls

 

The Latest on: Solar windows
  • Why Solar Advocates Are Crying Foul Over New York’s Latest REV Order
    on September 20, 2017 at 2:45 pm

    But the PSC’s order would allow at least some of these calculations to be revisited every three years, leaving open the possibility that future revenues could be drastically changed three times within that 10-year window. According to the solar groups ... […]

  • 1.6 million traveled in SC to see solar eclipse
    on September 20, 2017 at 1:08 pm

    Click to share on Pinterest (Opens in new window) COLUMBIA, S.C. (WCBD) —- Roughly 1.6 million people traveled to or within South Carolina to view the total solar eclipse last month, according to research released today by the South Carolina Department ... […]

  • Australian solar team prepares for global race
    on September 20, 2017 at 10:47 am

    The solar-powered car was built by students at the University ... This year's race marks the original event's 30th anniversary. Press CTRL+C (Windows), CMD+C (Mac), or long-press the URL below on your mobile device to copy the cod […]

  • Solar Decathlon Preview: MST's Modern Twist on Traditional Farmhouse
    on September 20, 2017 at 8:48 am

    In addition, voice commands give SILO occupants control over the thermostat, lighting, fans, and clerestory windows from any area of the house. SILO’s energy storage system, which can be controlled and monitored on a smartphone, includes an 8.5kW solar ... […]

  • These New Solar Cells Are Modeled After a Fly’s Eye
    on September 19, 2017 at 9:16 am

    The solar cells can be outfitted into windows, car tops or other surfaces exposed to light. Some companies are even printing the cells. Co suspects perovskite solar cells will initially impact niche markets. “I could see them being sold on iPad ... […]

  • Real estate briefly: Chefmaster building in Fullerton sold for $7.3 million; solar info sessions ahead for homeowners
    on September 18, 2017 at 10:49 am

    Click to share on Facebook (Opens in new window) Click to share on Twitter (Opens in new window ... The Rancho Santa Margarita Solar Education Series will help educate homeowners on solar energy, battery storage and integration, policy changes, available ... […]

  • Albuquerque man creates solar lawn mower, hopes to inspire ‘green’ living
    on September 17, 2017 at 9:02 pm

    Click to share on Twitter (Opens in new window) Click to share on Google+ (Opens in new window ... anyone can chip in for Mother Earth. He says building a solar lawn-mower just made sense. “I went and looked at [traditional lawn mowers] and they were ... […]

  • Solar Control Films Market : Analysis and Forecast by 2024
    on September 13, 2017 at 11:48 am

    A solar control film is a thin laminate designed to adhere to windows, doors, or other transparent building surfaces to reflect sunlight and regulate the internal temperature of a building. This temperature regulation is achieved by reflecting ultraviolet ... […]

  • SPI 2017: Solar modules pushing the bar on performance
    on September 10, 2017 at 10:44 am

    ... the company to develop vision glass that can be used in locations not typically associated with solar panels; these include skylights, patios, and window openings, providing a see-through surface that generates electricity. Leading ‘Silicon Module ... […]

via Google News and Bing News

Other Interesting Posts

Leave a Reply

%d bloggers like this: