In today’s world, there is a huge demand for energy. With the continuous depletion of fossil fuels, there is an urgent need for alternate forms of energy, in particular technologies that are renewable, sustainable, and inexpensive. Solar cells have been considered a promising potential solution to this problem, but issues with conventional photovoltaic cells based on crystalline materials include high manufacturing cost, poor durability, and limited versatility. Currently, only 0.25% of the United States electricity needs are met by solar energy; to contrast, coal provides almost 42% of the country’s electricity, despite the massive health and environmental effects associated with coal power. Photovoltaic cells have the potential to be more cost efficient and more environmentally friendly than the current mainstream sources of electricity production, with approximately 1kW-h of sunlight hitting each square meter of the Earth per hour (comparatively, the average American home uses around 10,837kW-h per year1). Colloidal quantum dots (CQDs) are one attractive alternative material for closing this cost gap because they offer the promise of low cost fabrication based on solution processing and tunable optical and electrical functionalities2.
CQDs are nanometer-sized semiconductor particles that are synthesized in the solution phase3. Their bandgaps can be tuned through the quantum size effect by varying the size of the nanoparticles. Therefore, they can be designed to absorb light over a wide range of wavelengths, and films made of these particles possess unique absorption and reflection spectra. The overall goal of my project is to address some of the issues in the current photovoltaics industry, more specifically to use inexpe...
... middle of paper ...
...oes an American Home Use?" U.S. Energy Information Administration - EIA - Independent Statistics and Analysis. n.p., 10 Jan. 2014. Web. 13 May 2014.
2. E. Sargent, “Colloidal quantum dot solar cells,” Nature Photonics, 6, 133–135 (2012).
3. J. Kim, O. Voznyy, D. Zhitomirsky, E. Sargent, “25th Anniversary Article: Colloidal Quantum Dot Materials and Devices: A Quarter-Century of Advances,” Advanced Materials, 25, 4986-5010 (2013).
4. Meinardi, Francesco, et al. "Large-area luminescent solar concentrators based on/Stokes-shift-engineered/'nanocrystals in a mass-polymerized PMMA matrix," Nature Photonics, 8, 392-399 (2014).
5. G. Burkhard, E. Hoke, M. McGehee, "Accounting for interference, scattering, and electrode absorption to make accurate internal quantum efficiency measurements in organic and other thin solar cells," Advanced Materials, 50, 3293-3297 (2010).
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- The diversification in terms of sustainable energy and the utilization renewable energy options in various practical uses have become one of the most significant factors as a substitutable source for oil and gas. In addition, it could be a viable solution for environmental problems. Omubo-Pepple et al. (2009) believe that the effective solution for environmental degradation, resulted from the use of fossil fuels which caused some dangerous problems such as acid rain, green house effect and ozone layer depletion, is to increase in renewable energy options uses.... [tags: Energy]
1308 words (3.7 pages)
- At the bottom of water is plant matter. That is what coal starts off as. It is covered in sediments and eventually goes through metamorphosis. After metamorphosis, it eventually becomes coal, which is one of the three most important resources on Earth. Another resource is solar energy, which is now being widely used in a variety of ways. Panels and sun light are what is used to collect this type of energy efficiently. The third type of energy resource is water. This type of energy can be conserved when a plan is implemented.... [tags: energy resource, environment, solar energy]
1546 words (4.4 pages)
- In recent decades, much debate has ensued about the vast amount of natural resources and ecological services society depletes. Moreover, the debate has evaluated how society depletes these natural resources at a faster rate than the environment can replenish. It also assesses how society can mitigate these environmental issues in order to preserve our natural resources for the prosperity of future generations. Research suggests that the natural resources we currently use, such as coal and petroleum, could be fully depleted within the next 25 and 100 years respectively (Byrd, 2012).... [tags: alternative energy, environment, pollution]
3672 words (10.5 pages)
- “’Is renewable energy an economically viable option for South Africa?’’ For me it is, but you would need to consider many other factors such as will it pay off for our Nation in the long run, and in my opinion, it does. Many of the world’s nations rely only on coal (South Africa being one of them) which is harmful to the environment due to the fact that it is a fossil fuel and is also limited, meaning in the future we will need to turn to an alternative source to generate power. There are also many types of Renewable energy sources such as: Solar Power, Geothermal energy, Wind Power and Hydropower.... [tags: solar energy, power, global warming]
844 words (2.4 pages)
- When picking an energy resource for the topic of this paper, I bounced around a lot of ideas. Then it occurred to me that I should write about what I will be living with in about a month. My mom just finished designing and building our earthbag, solar, off-grid house, a four-year endeavor. I will soon live in a place powered by one of the most common alternative energy resources, solar energy, so I should learn more about it. At our new house, we have two stand alone pedestals with six 170W panels on each pedestal, making for 2040W or 2kW solar system.... [tags: Energy]
852 words (2.4 pages)
- As the harmful side effects of fossil fuel burning become evermore recognized, the use of clean, renewable technology becomes essential to our health, economy and environment. Petroleum and coal emit harmful pollutants into the atmosphere, contributing to global warming, acid rain and a host of other aliments. Equally concerning is the dependence of the economy on a finite resource such as oil. With world energy consumption rapidly rising, demand is increasing for renewable energy sources that have no significant health impact or environmental degradation.... [tags: Alternative Energy, Wind Energy]
2736 words (7.8 pages)
- Renewable energy is energy that comes from sources that are restored naturally on a human timescale. This includes: sunlight, waves, tides, water, rain and geothermal heat. Roughly 16% of the world’s energy consumption is supplied by Renewable sources. Wind Energy Wind energy is the form of renewable energy that converts the wind energy from the wind currents into energy that can be useful to man. This is done using windmills (for mechanical energy), wind turbines (for electricity), sails (to direct ships) and wind pumps (for drainage or water pumping).... [tags: wind energy, hydroelectric energy]
720 words (2.1 pages)
- ... At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind. Turbines catch the wind's energy with their propeller-like blades. Usually, two or three blades are mounted on a shaft to form a rotor. (renewableenergy.com) Wind power has become affordable enough to compete with fossil fuels. Around the world utility services are offering wind-generated electricity at a premium of 2 to 3 cents per kWh. A household that uses wind power for a quarter of its electrical needs, the cost would only be $4 or $5 dollars per month for it and the price is still dropping.... [tags: wind turbines, sources of energy]
630 words (1.8 pages)
- As the population continues to increase day after day, so does the demand for oil and other natural resources. Eventually we will get to a point where we will need to find different ways of efficiently producing energy at a low cost. Twenty to thirty years ago it was hard to imagine what sources of energy (other than obvious possibilities like solar panels and windmills) that could efficiently supply the world. The advancement of technology today is opening new doors in the energy field that are likely to change the way we think about energy.... [tags: Energy Research Papers, 2015]
832 words (2.4 pages)
- Wind Power as an Alternate Energy Source Graphics not Included ABSTRACT The United States' main source of energy is currently fossil fuels. However, we know that fossil fuel supply continues to deplete and sooner or later, the United States will need to resort to a new source of energy. This report hopes to explore the advantages and disadvantages of wind power using model regions. These regions have experience in using wind power, which may help us determine whether or not it is a suitable source of energy when fossil fuels are completely drained.... [tags: Energy Power Global Warming]
2003 words (5.7 pages)