Abstract
A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.
| Original language | English |
|---|---|
| Pages (from-to) | 530-539 |
| Number of pages | 10 |
| Journal | Nano Energy |
| Volume | 15 |
| DOIs | |
| Publication status | Published - 2015 Jul 1 |
| Externally published | Yes |
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Keywords
- Hybrid solar cells
- J-V hysteresis
- Li-treatment
- Methylammoniumleadtriiodide
- Perovskite
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering
Cite this
Hysteresis-less mesoscopic CH3NH3PbI3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode. / Heo, Jin Hyuck; You, Myoung Sang; Chang, Min Hyuk; Yin, Wenping; Ahn, Tae Kyu; Lee, Sang Ju; Sung, Shi Joon; Kim, Dae Hwan; Im, Sang Hyuk.
In: Nano Energy, Vol. 15, 01.07.2015, p. 530-539.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hysteresis-less mesoscopic CH3NH3PbI3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode
AU - Heo, Jin Hyuck
AU - You, Myoung Sang
AU - Chang, Min Hyuk
AU - Yin, Wenping
AU - Ahn, Tae Kyu
AU - Lee, Sang Ju
AU - Sung, Shi Joon
AU - Kim, Dae Hwan
AU - Im, Sang Hyuk
PY - 2015/7/1
Y1 - 2015/7/1
N2 - A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.
AB - A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.
KW - Hybrid solar cells
KW - J-V hysteresis
KW - Li-treatment
KW - Methylammoniumleadtriiodide
KW - Perovskite
UR - http://www.scopus.com/inward/record.url?scp=84930946618&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84930946618&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2015.05.014
DO - 10.1016/j.nanoen.2015.05.014
M3 - Article
VL - 15
SP - 530
EP - 539
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -