Giant photovoltaic response in band engineered ferroelectric perovskite
Recently the solar energy, an inevitable part of green energy source, has become a mandatory topics in frontier research areas. In this respect, non-centrosymmetric ferroelectric perovskites with open circuit voltage ( V OC ) higher than the bandgap, gain tremendous importance as next generation pho...
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| Published in: | Scientific reports Vol. 8; no. 1; pp. 8005 - 7 |
|---|---|
| Main Authors: | , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
London
Nature Publishing Group UK
22-05-2018
Nature Publishing Group |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Recently the solar energy, an inevitable part of green energy source, has become a mandatory topics in frontier research areas. In this respect, non-centrosymmetric ferroelectric perovskites with open circuit voltage (
V
OC
) higher than the bandgap, gain tremendous importance as next generation photovoltaic materials. Here a non-toxic co-doped Ba
1−
x
(Bi
0.5
Li
0.5
)
x
TiO
3
ferroelectric system is designed where the dopants influence the band topology in order to enhance the photovoltaic effect. In particular, at the optimal doping concentration (
x
opt
~ 0.125) the sample reveals a remarkably high photogenerated field
E
OC
= 320 V/cm (
V
OC
= 16 V), highest ever reported in any bulk polycrystalline non-centrosymmetric systems. The band structure, examined through DFT calculations, suggests that the shift current mechanism is key to explain the large enhancement in photovoltaic effect in this family. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 2045-2322 2045-2322 |
| DOI: | 10.1038/s41598-018-26205-x |