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Giant photovoltaic response in band engineered ferroelectric perovskite.

ABSTRACT: 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 (VOC) higher than the bandgap, gain tremendous importance as next generation photovoltaic materials. Here a non-toxic co-doped Ba1-x(Bi0.5Li0.5) x TiO3 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 EOC?=?320?V/cm (VOC?=?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.

SUBMITTER: Pal S

PROVIDER: S-EPMC5964148 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Giant photovoltaic response in band engineered ferroelectric perovskite.

Pal Subhajit S Swain Atal Bihari AB Biswas Pranab Parimal PP Murali D D Pal Arnab A Nanda B Ranjit K BRK Murugavel Pattukkannu P

Scientific reports 20180522 1

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 (VOC) higher than the bandgap, gain tremendous importance as next generation photovoltaic materials. Here a non-toxic co-doped Ba1-x(Bi0.5Li0.5) x TiO3 ferroelectric system is designed where the dopants influence the ...[more]

PMID: 29789634

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