Abstract
Methylammonium lead iodide (MAPbI 3 ) exhibits exceptional photovoltaic performance, but there remains substantial controversy over the existence and impact of ferroelectricity on the photovoltaic response. We confirm ferroelectricity in MAPbI 3 single crystals and demonstrate mediation of the electronic response by ferroelectric domain engineering. The ferroelectric response sharply declines above 57°C, consistent with the tetragonal-to-cubic phase transition. Concurrent band excitation piezoresponse force microscopy–contact Kelvin probe force microscopy shows that the measured response is not dominated by spurious electrostatic interactions. Large signal poling (>16 V/cm) orients the permanent polarization into large domains, which show stabilization over weeks. X-ray photoemission spectroscopy results indicate a shift of 400 meV in the binding energy of the iodine core level peaks upon poling, which is reflected in the carrier concentration results from scanning microwave impedance microscopy. The ability to control the ferroelectric response provides routes to increase device stability and photovoltaic performance through domain engineering.
| Original language | English (US) |
|---|---|
| Article number | eaas9311 |
| Journal | Science Advances |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 25 2019 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
- General
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The existence and impact of persistent ferroelectric domains in MAPbI 3 . / Garten, Lauren M.; Moore, David T.; Nanayakkara, Sanjini U.; Dwaraknath, Shyam; Schulz, Philip; Wands, Jake; Rockett, Angus; Newell, Brian; Persson, Kristin A.; Trolier-McKinstry, Susan; Ginley, David S.
In: Science Advances, Vol. 5, No. 1, eaas9311, 25.01.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - The existence and impact of persistent ferroelectric domains in MAPbI 3
AU - Garten, Lauren M.
AU - Moore, David T.
AU - Nanayakkara, Sanjini U.
AU - Dwaraknath, Shyam
AU - Schulz, Philip
AU - Wands, Jake
AU - Rockett, Angus
AU - Newell, Brian
AU - Persson, Kristin A.
AU - Trolier-McKinstry, Susan
AU - Ginley, David S.
PY - 2019/1/25
Y1 - 2019/1/25
N2 - Methylammonium lead iodide (MAPbI 3 ) exhibits exceptional photovoltaic performance, but there remains substantial controversy over the existence and impact of ferroelectricity on the photovoltaic response. We confirm ferroelectricity in MAPbI 3 single crystals and demonstrate mediation of the electronic response by ferroelectric domain engineering. The ferroelectric response sharply declines above 57°C, consistent with the tetragonal-to-cubic phase transition. Concurrent band excitation piezoresponse force microscopy–contact Kelvin probe force microscopy shows that the measured response is not dominated by spurious electrostatic interactions. Large signal poling (>16 V/cm) orients the permanent polarization into large domains, which show stabilization over weeks. X-ray photoemission spectroscopy results indicate a shift of 400 meV in the binding energy of the iodine core level peaks upon poling, which is reflected in the carrier concentration results from scanning microwave impedance microscopy. The ability to control the ferroelectric response provides routes to increase device stability and photovoltaic performance through domain engineering.
AB - Methylammonium lead iodide (MAPbI 3 ) exhibits exceptional photovoltaic performance, but there remains substantial controversy over the existence and impact of ferroelectricity on the photovoltaic response. We confirm ferroelectricity in MAPbI 3 single crystals and demonstrate mediation of the electronic response by ferroelectric domain engineering. The ferroelectric response sharply declines above 57°C, consistent with the tetragonal-to-cubic phase transition. Concurrent band excitation piezoresponse force microscopy–contact Kelvin probe force microscopy shows that the measured response is not dominated by spurious electrostatic interactions. Large signal poling (>16 V/cm) orients the permanent polarization into large domains, which show stabilization over weeks. X-ray photoemission spectroscopy results indicate a shift of 400 meV in the binding energy of the iodine core level peaks upon poling, which is reflected in the carrier concentration results from scanning microwave impedance microscopy. The ability to control the ferroelectric response provides routes to increase device stability and photovoltaic performance through domain engineering.
UR - http://www.scopus.com/inward/record.url?scp=85060787038&partnerID=8YFLogxK
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U2 - 10.1126/sciadv.aas9311
DO - 10.1126/sciadv.aas9311
M3 - Article
C2 - 30746434
AN - SCOPUS:85060787038
VL - 5
JO - Indian Journal of Pure and Applied Physics
JF - Indian Journal of Pure and Applied Physics
SN - 0019-5596
IS - 1
M1 - eaas9311
ER -