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Flexible perovskite solar cell on metal plate

Lee, Seongha (2017) Flexible perovskite solar cell on metal plate. Master's Thesis, University of Pittsburgh. (Unpublished)

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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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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Lee, Seonghasel83@pitt.edusel83
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLee, Sung-Kunjul37@pitt.edujul37
Committee MemberLee, Sangyeopsylee@pitt.edusylee
Committee MemberWang, Qing-Mingqiw4@pitt.eduqiw4
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


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