Judges’ Queries and Presenter’s Replies

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Presentation Discussion

  • Icon for: Robert Opila

    Robert Opila

    Faculty
    May 25, 2012 | 06:16 a.m.

    good job—what was the efficiency (I know I shouldn’t ask that question)

  • Icon for: Wei-Chang Yang

    Wei-Chang Yang

    Presenter
    May 25, 2012 | 02:05 p.m.

    Thanks for your visit. The total area efficiency of a CZTS cell is above 8% under AM 1.5 illumination.

  • Further posting is closed as the competition has ended.

  1. Wei-Chang Yang
  2. http://www.igert.org/profiles/3172
  3. Project Associate
  4. Presenter’s IGERT
  5. Purdue University
  1. Kevin Brew
  2. http://www.igert.org/profiles/3820
  3. Project Associate
  4. Presenter’s IGERT
  5. Purdue University
  1. Nathaniel Carter
  2. http://www.igert.org/profiles/3798
  3. Graduate Student
  4. Presenter’s IGERT
  5. Purdue University
  1. Chuck Hages
  2. http://www.igert.org/profiles/3828
  3. Project Associate
  4. Presenter’s IGERT
  5. Purdue University
  1. Jim Moore
  2. http://www.igert.org/profiles/3188
  3. Graduate Student
  4. Presenter’s IGERT
  5. Purdue University
  1. Hye Yeon Park
  2. http://www.igert.org/profiles/3613
  3. Project Associate
  4. Presenter’s IGERT
  5. Purdue University
  1. Erik Sheets
  2. http://www.igert.org/profiles/3834
  3. Project Associate
  4. Presenter’s IGERT
  5. Purdue University
  1. Bryce Walker
  2. http://www.igert.org/profiles/3115
  3. Graduate Student
  4. Presenter’s IGERT
  5. Purdue University

A Low-Cost Approach to Fabricating Thin-Film Solar Cells: From Nanocrystals To Thin-Films

Within the Solar Economy IGERT (SEIGERT), a group of researchers develop and optimize a scalable process to fabricate low-cost thin-film solar cells for the demands of harvesting clean and inexpensive energy from sunlight. Utilizing the nanocrystal-based process developed in-house, the Cu2ZnSn(S1-ySey)4 (CZTSSe) thin-film solar cells demonstrate their potential by achieving total area 8.5% power conversion efficiency (PCE) under AM1.5 illumination. The method focuses on CZTS nanocrystals that are first synthesized and later selenized into a dense CZTSSe layer, which serves as the absorber material.
In order to understand the phase transition from nanocrystals to dense thin-films, the chemical compositions and crystal structures of multinary phases in nanocrystals and thin-films must be studied. CZTS nanocrystals with tunable Cu, Zn, and Sn contents and various crystal structures (kesterite/stannite and wurtzite) have been investigated and compared to the respective selenized thin-films by means of powder X-ray diffraction (PXRD), high-resolution transmission electron microscopy (HRTEM), and energy-dispersive X-ray spectroscopy (EDX).