favorable for exploiting commercial

 

quantum dot solar cell


 

A novel technology that can improve the efficiency of quantum dot solar cells to 11.53% has been unveiled. Published in the February 2020 issue of Advanced Energy Materials, it has been evaluated as a study that solved the challenges posed by the generation of electric currents from sunlight by solar cells by enhancing the hole extraction.

A research team, led by Professor Sung-Yeon Jang in the School of Energy and Chemical Engineering at UNIST has developed a photovoltaic device that maximizes the performance of quantum dot solar cells by using organic polymers.

Solar cells use a characteristic of which electrons and holes are generated in the absorber layer. The free free electrons and hole then move through the cell, creating and filling in holes. It is this movement of electrons and holes that generate electricity. Therefore, creating multiple electron-hole pairs and transporting them are an important consideration in the design of efficient solar cells.

Generally, quantum dot solar cells combine electron-rich quantum dots (n-type CQDs) and hole-rich quantum dots (p-type QDs). In this work, the research team developed organic π‐conjugated polymer (π‐CP) based HTMs, which can achieve performance superior to that of state‐of‐the‐art HTM, p‐type CQDs. The molecular engineering of the π‐CPs alters their optoelectronic properties, and the charge generation and collection in colloidal quantum dot solar cells (CQDSCs), using them are substantially improved.

As a result, the research team succeeded in achieving power conversion efficiency (PCE) of 11.53% with decent air‐storage stability. This is the highest reported PCE among CQDSCs using organic HTMs, and even higher than the reported best solid‐state ligand exchange‐free CQDSC using pCQD‐HTM. "From the viewpoint of device processing, device fabrication does not require any solid‐state ligand exchange step or layer‐by‐layer deposition process, which is favorable for exploiting commercial processing techniques," noted the research team.

Popular posts from this blog

electric vehicle battery courses

top data-analytics Link electric vehicle course in iit masters in electric vehicle engineering in india electric vehicle courses in india electric car charging stations business opportunity in india electric vehicle training courses india electric vehicle course in hyderabad academy of ev technology electric vehicle charging station project report hero electric bike spare parts price list m tech in electric vehicles in india electric vehicle charging station project ppt electric vehicle charging station ppt electric vehicle charging station training by government electric bike repair course in india ev courses in india electric bike training courses lithium ion battery manufacturing plant project report pdf electric bike course electric vehicle charging station in india ppt electric scooter repair training masters in electric vehicles india lithium ion battery raw material suppliers india electric vehicle course in pune electric vehicle en...
Read more

Lithium-ion Battery Future Trend

Image
Lithium-ion battery  is the core component of electric vehicles, grid trough periods of surplus electricity can be stored and used to drive an electric car, you can implement the strategy of low power instead of oil, reduce our demand for oil and improve urban air quality, battery store excess electricity during peak hours back to the grid can also achieve peaking. Once the grid has a strong ability to regulate the power of solar, wind, geothermal, ocean energy and other clean power generation means for generating intermittent easily into the grid, clean energy will gain large-scale applications, which solve mankind’s energy and environmental problems It will have a crucial role. Characteristics of the  lithium-ion battery industry  is the quantity, but the large scale, high technology and equipment of small, has a strong capability of independent innovation and even less, companies need to strengthen the capability of independ...
Read more

important these technologies will be for the future

Image
  Next generation battery technology   WHAT IS IT? In lithium-ion (Li-ion) batteries, energy storage and release is provided by the movement of lithium ions from the positive to the negative electrode back and forth via the electrolyte. In this technology, the positive electrode acts as the initial lithium source and the negative electrode as the host for lithium. Several chemistries are gathered under the name of Li-ion batteries, as the result of decades of selection and optimization close to perfection of positive and negative active materials. Lithiated metal oxides or phosphates are the most common material used as present positive materials. Graphite, but also graphite/silicon or lithiated titanium oxides are used as negative materials. WHAT ARE ITS ADVANTAGES? Today, among all the state-of-the-art storage technologies, Li-ion battery technology allows the highest level of energy density. Performances such as fast charge or temperature operating window (-50°C up to 125°C...
Read more