Lee, Seongha
(2017)
Flexible perovskite solar cell on metal plate.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
I report highly bendable and efficient perovskite solar cells (PSCs) that use thermally oxidized layer of Titanium (Ti) metal plate as an electron transport layer (ETL). The power conversion efficiency of flexible PSCs reaches 14.9 % with short-circuit current density (Jsc) of 17.9 mA/cm2, open circuit voltage (Voc) of 1.09, and fill factor (ff) of 0.74. Moreover, the Ti metal based PSCs exhibit a superior fatigue resistance than ITO/PEC substrate, which flexible PSCs is maintained at 100 % of their initial PCE even after PSCs are bent at R= 4 mm, and 1000 times. This excellent performance of flexible PSCs is due to high crystalline quality and low oxygen vacancy concentration of TiO2 layer. The concentration of oxygen vacancies in the oxidized TiO2 layer of Ti metal surface controls the electric function of TiO2 as ETL of PSCs. A decrease in the oxygen vacancy concentration of TiO2 layer is critical to improving the electron collection efficiency of ETL. Our results suggest that Ti metal based PSCs possess excellent mechanical properties which can be applied to the renewable energy source of wearable electronics.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
|
| Date: |
13 June 2017 |
| Date Type: |
Publication |
| Defense Date: |
30 March 2017 |
| Approval Date: |
13 June 2017 |
| Submission Date: |
4 April 2017 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
69 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering |
| Degree: |
MSME - Master of Science in Mechanical Engineering |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Flexible, perovskite solar cell, and metal plate |
| Date Deposited: |
13 Jun 2017 16:01 |
| Last Modified: |
13 Jun 2017 16:01 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/31273 |
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