Ferroelectric photovoltaic characteristics of pulsed laser deposited 0.5Ba (Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3/ZnO heterostructures

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Silva, JPB (Author) Other; Sekhar, KC (Author) Other; Cortes Juan, F (Author) Other; Negrea, RF (Author) Other; Kuncser, AC (Author) Other; Connolly, JP (Author) Other; Ghica, C (Author) Other; Agostinho Moreira, JA (Author) FCUP

Journal

Title: Solar Energy

Vol. 167

Pages: 18-23

ISSN: 0038-092X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-00P-VKB

DOI: 10.1016/j.solener.2018.03.072

Abstract (EN): In this work, we investigate the photovoltaic response of Pt/0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3(0.5BZT-0.5BCT)/ITO structures through the insertion of a semiconductor ZnO layer at different positions. The values of short-circuit photocurrent density (J(sc)) of the Pt/ZnO/0.5BZT-0.5BCT/ITO, Pt/0.5BZT-0.5BCT/ZnO/ITO and Pt/ZnO/0.5BZT-0.5BCT/ZnO/ITO capacitors are around 5.31, 0.0034 and 0.052 mA/cm(2), respectively. The enhanced photovoltaic (PV) effect is observed when ZnO layer is inserted between Pt and the 0.5BZT-0.5BCT layer. The built-in field developed at the ZnO/ferroelectric interface in the same direction of the depolarizing field, provides a favorable electric potential for the efficient separation and transportation of photo generated e-h pairs. Furthermore, the polarization-dependent interfacial coupling effect enhances PV effect, which is confirmed by investigating the role of polarization flipping on switchable photo response. This work provides an efficient pathway in tuning the PV response in ferroelectric-based solar cells.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6