High-Power
and Flexible Indoor Solar Cells via Controlled
Growth of Perovskite Using a Greener Antisolvent
Posted on 2020-06-16 - 09:29
Flexible
perovskite solar cells attract significant attention because
of their high accessibility in device fabrication, inexpensive fabrication
process, and remarkable power conversion efficiency (PCE). Solvent
engineering has been an important protocol for synthesizing high-quality
perovskite thin films. Toxic antisolvents such as chlorobenzene (CB)
are necessary to obtain desirable film morphologies. This study proposes
a novel green antisolvent, butyl acetate (BA). It exhibits low toxicity,
but its physical properties are similar to those of CB. The difference
between the solubility parameters of antisolvents and dimethyl sulfoxide
(DMSO) determines the volume of residual DMSO within perovskite–DMSO
complexes. During spin coating, BA leaves excess DMSO more effectively
than CB because of larger differences in solubility parameters, facilitating
the gradual nucleation and growth of perovskite grains. The resulting
enlarged grains (>1 μm) reduce trap density and improve charge
carrier mobility, resulting in a significant enhancement in the device
performance (PCE = 19.78%) and environmental stability (PCE retention
of 97.4% after 1000 h). Furthermore, highly efficient and flexible
devices are available as indoor light energy harvesters. At 400 lx
of a white light-emitting diode, a bent device with a bending radius
of 10 mm exhibits a remarkable maximum power density of 0.063 mW cm–2 and PCE of 23.33%.
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Kim, Soyoung; Oh, Heeyoon; Kang, Gumin; Han, Il Ki; Jeong, Inyoung; Park, Minwoo (1753). High-Power
and Flexible Indoor Solar Cells via Controlled
Growth of Perovskite Using a Greener Antisolvent. ACS Publications. Collection. https://doi.org/10.1021/acsaem.0c00997
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AUTHORS (6)
SK
Soyoung Kim
HO
Heeyoon Oh
GK
Gumin Kang
IH
Il Ki Han
IJ
Inyoung Jeong
MP
Minwoo Park