TY - JOUR
T1 - Grain Boundary Engineering of Halide Perovskite CH3NH3PbI3 Solar Cells with Photochemically Active Additives
AU - Faraji, Nastaran
AU - Qin, Chuanjiang
AU - Matsushima, Toshinori
AU - Adachi, Chihaya
AU - Seidel, Jan
N1 - Funding Information:
We acknowledge support by the Australian Research Council through Discovery Grants. J.S. further acknowledges travel support by I2CNER and UNSW strategic seed funding.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/3/8
Y1 - 2018/3/8
N2 - In this study, we investigate the nanoscale effects of photochemically active additives of benzoquinone (BQ), hydroquinone (HQ), and tetracyanoquinodimethane (TCNQ) on grain boundaries in CH3NH3PbI3 solar cells. We employ scanning probe microscopy under light illumination, in particular Kelvin probe force microscopy, to study surface potential changes under laser light illumination. The recently found improvement in the efficiency of BQ added solar cells can be clearly seen in vanishing contact potential differences at grain boundaries under illumination, rendering the material more uniform under solar cell operating conditions. These effects are observed for BQ, but not for HQ and TCNQ. Our findings shed light onto halide perovskite materials and the functional additive design for improved solar cell performance.
AB - In this study, we investigate the nanoscale effects of photochemically active additives of benzoquinone (BQ), hydroquinone (HQ), and tetracyanoquinodimethane (TCNQ) on grain boundaries in CH3NH3PbI3 solar cells. We employ scanning probe microscopy under light illumination, in particular Kelvin probe force microscopy, to study surface potential changes under laser light illumination. The recently found improvement in the efficiency of BQ added solar cells can be clearly seen in vanishing contact potential differences at grain boundaries under illumination, rendering the material more uniform under solar cell operating conditions. These effects are observed for BQ, but not for HQ and TCNQ. Our findings shed light onto halide perovskite materials and the functional additive design for improved solar cell performance.
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U2 - 10.1021/acs.jpcc.8b00804
DO - 10.1021/acs.jpcc.8b00804
M3 - Article
AN - SCOPUS:85043683484
SN - 1932-7447
VL - 122
SP - 4817
EP - 4821
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 9
ER -