Abstract
Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3 NH3 PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).
| Original language | English |
|---|---|
| Article number | 10379 |
| Journal | Nature communications |
| Volume | 7 |
| DOIs | |
| Publication status | Published - 2016 Jan 13 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)
Cite this
Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells. / Giordano, Fabrizio; Abate, Antonio; Correa Baena, Juan Pablo; Saliba, Michael; Matsui, Taisuke; Im, Sang Hyuk; Zakeeruddin, Shaik M.; Nazeeruddin, Mohammad Khaja; Hagfeldt, Anders; Graetzel, Michael.
In: Nature communications, Vol. 7, 10379, 13.01.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells
AU - Giordano, Fabrizio
AU - Abate, Antonio
AU - Correa Baena, Juan Pablo
AU - Saliba, Michael
AU - Matsui, Taisuke
AU - Im, Sang Hyuk
AU - Zakeeruddin, Shaik M.
AU - Nazeeruddin, Mohammad Khaja
AU - Hagfeldt, Anders
AU - Graetzel, Michael
PY - 2016/1/13
Y1 - 2016/1/13
N2 - Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3 NH3 PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).
AB - Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3 NH3 PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).
UR - http://www.scopus.com/inward/record.url?scp=84955149129&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84955149129&partnerID=8YFLogxK
U2 - 10.1038/ncomms10379
DO - 10.1038/ncomms10379
M3 - Article
AN - SCOPUS:84955149129
VL - 7
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 10379
ER -