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Title: Giant Bulk Photovoltaic Effect in Vinylene-Linked Hybrid Heterocyclic Polymer

Journal Article · · Journal of Physical Chemistry. C
ORCiD logo [1];  [2];  [2]
  1. Carnegie Inst. of Science, Washington, DC (United States). Geophysical Lab., Extreme Materials Initiative
  2. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Chemistry

The bulk photovoltaic effect refers to the generation of a steady photocurrent from a homogeneous noncentrosymmetric material. It offers an alternative to the traditional p–n junction-based photovoltaic mechanism to directly convert sunlight to electricity. In this work, we investigate the bulk photovoltaic effect in low-dimensional polar organic materials with first-principles density functional theory calculations and shift current theory. With a strategy designed to break the inversion symmetry along the polymer chain, we demonstrate that conjugated vinylene-linked hybrid heterocyclic polymers can produce a strong bulk photovoltaic response to light, outperforming benchmark inorganic materials. The high current density results from the delocalized wave functions, composed mainly of carbon p orbitals. The great structural and electronic flexibility of polymers offers a robust paradigm to enhance the shift current response through chemical and physical modifications. The development of polymer blends with polymers of different band gaps potentially enables the utilization of the whole visible light spectrum for energy conversion.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-07ER46431
OSTI ID:
1480463
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 12; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (4)

Strong bulk photovoltaic effect in chiral crystals in the visible spectrum journal December 2019
Strong bulk photovoltaic effect in chiral crystal in the visible spectrum text January 2019
Shift current photovoltaic effect in a ferroelectric charge-transfer complex journal August 2017
Upper limit on shift current generation in extended systems journal August 2019

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