DTU Studieprojekt - Laser lift off process for Cu2ZnSnS4 solar cell - Back contact engineering and tandem structure with Silicon solar cell

Danmarks Tekniske Universitet (DTU)

Studieprojekt/speciale
Storkøbenhavn

Laser lift off process for Cu2ZnSnS4 solar cell - Back contact engineering and tandem structure with Silicon solar cell

Udbyder
Vejleder
Sted
København og omegn
Introduction: Renewable energies are considered as only safe energy sources that should be used in the future. The other types of energy sources adds heat and chemicals to the environment. All these could lead to climate changes and environmental pollutions.

Cu2ZnSnS4 (CZTS) is a promising material that consists of earth abundant and non-toxic elements. Due to its high light absorption coefficient, it can be 300 times thinner (1 µm) than conventional silicon solar cells. As the material gets thinner, it becomes flexible and opens up completely new possibilities for applications such as wearable and easy to transport products. It is also possible to make this compound by chemical process and printing technologies.

CZTS is usually grown on molybdenum substrate by high temperature (~570°C) sulfurization of Cu, Zn and Sn. Molybdenum substrate is then later used as a back contact for solar cell. There are not many metals that are as resilient as Mo in high temperature sulfurization. Therefore, researches involving different back contact or back surface passivation are very few.

Laser lift off process and back contact engineering:

  • Laser lift off is a method that separates two layers of material with significant bandgap difference. The high power laser pulse (25 ns duration) transmit through the transparent substrate and knocks off the thin materials on top. Employing laser lift off process will enable us to grow CZTS (and the subsequent cell) on different crystalline substrates and transfer the cell on any highly reflective back contact material. Using crystalline substrates, such as sapphire,
  • quartz might allow us to grow epitaxial CZTS films with fewer defects. This is a novel technique in the field of CZTS research. Initial trials for laser lift off process with KrF 248 nm excimer laser has been successfully made.

CZTS/Si tandem structure: Another advantage of laser lift off process is that it can be perfect way to make tandem CZTS/Si solar cell. Manufacturing tandem solar cell is usually a complex process. The main problem of integrating CZTS with silicon layer will be high temperature sulfurization process. During this process, Cu and S can contaminate and degrade the bottom silicon solar cell. Copper is notorious for degrading device performance of silicon solar cells. Sulfur is also highly reactive element, which will cause detrimental effects.

Opportunities: The main focus of this project will be on interface between CZTS and back contact with this novel technique. Furthermore, the student will be able to experience solar cell production process from a scratch. It is good opportunity to learn about how physics, chemistry, and mathematical models all connect when making solar cell in the purpose of maximizing efficiency. You have to be open minded and creative to find the ways to improve the efficiency and explain the results.

Feel free to contact if you have questions.

Forudsætninger
Solid background in physics, creativity and passion

Emneord

Tags
Kontakt
Virksomhed/organisation
DTU Fotonik

Navn
Mungunshagai Gansukh

Stilling
Ph.d.-studerende

Mail
mugan@fotonik.dtu.dk

Vejleder-info
Bachelor i Kemi og Teknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Bachelor i Elektroteknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Bachelor i Fysik og Nanoteknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Anvendt Kemi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Elektroteknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Fotonik
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Materiale- og Procesteknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Fysik og Nanoteknologi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Bæredygtig Energi
Vejleder
Mungunshagai Gansukh

Medvejledere
Stela Canulescu

ECTS-point
15 - 30

Type
Afgangsprojekt, Bachelorprojekt, Kandidatspeciale


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Danmarks Tekniske Universitet (DTU) - hurtigt overblik


Danmarks Tekniske Universitet (DTU)
Danmarks Tekniske Universitet (DTU)
DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 11.200 studerende uddanner sig her til fremtiden, og 6.000 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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