Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO2 Beads as Electron-Selective Contact

Ji Youn Seo; Ryusuke Uchida; Hui Seon Kim; Yasemin Saygili; Jingshan Luo; Chris Moore; Julie Kerrod; Anthony Wagstaff; Mike Eklund; Robert McIntyre; Norman Pellet; Shaik M. Zakeeruddin; Anders Hagfeldt; Michael Grätzel

doi:10.1002/adfm.201705763

Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO₂ Beads as Electron-Selective Contact

Ji Youn Seo, Ryusuke Uchida, Hui Seon Kim, Yasemin Saygili, Jingshan Luo, Chris Moore, Julie Kerrod, Anthony Wagstaff, Mike Eklund, Robert McIntyre, Norman Pellet, Shaik M. Zakeeruddin, Anders Hagfeldt, Michael Grätzel

Research output: Contribution to journal › Article › peer-review

129 Scopus citations

Abstract

Rapid extraction of photogenerated charge carriers is essential to achieve high efficiencies with perovskite solar cells (PSCs). Here, a new mesoscopic architecture as electron-selective contact for PSCs featuring 40 nm sized TiO₂ beads endowed with mesopores of a few nanometer diameters is introduced. The bimodal pore distribution inherent to these films produces a very large contact area of 200 m² g⁻¹ whose access by the perovskite light absorber is facilitated by the interstitial voids between the particles. Modification of the TiO₂ surface by CsBr further strengthens its interaction with the perovskite. As a result, photogenerated electrons are extracted rapidly producing a very high fill factor of close to 80% a V_OC of 1.14 V and a PCE up to 21% with negligible hysteresis.

Original language	English
Article number	1705763
Journal	Advanced Functional Materials
Volume	28
Issue number	15
DOIs	https://doi.org/10.1002/adfm.201705763
State	Published - 11 Apr 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

cesium doping
hysteresis
mesoporous TiO
passivation
perovskite solar cells
photovoltaics

Access to Document

10.1002/adfm.201705763

Cite this

Seo, J. Y., Uchida, R., Kim, H. S., Saygili, Y., Luo, J., Moore, C., Kerrod, J., Wagstaff, A., Eklund, M., McIntyre, R., Pellet, N., Zakeeruddin, S. M., Hagfeldt, A., & Grätzel, M. (2018). Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO₂ Beads as Electron-Selective Contact. Advanced Functional Materials, 28(15), Article 1705763. https://doi.org/10.1002/adfm.201705763

@article{632cbcd063d542349163b36a8a1b7e32,

title = "Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO2 Beads as Electron-Selective Contact",

abstract = "Rapid extraction of photogenerated charge carriers is essential to achieve high efficiencies with perovskite solar cells (PSCs). Here, a new mesoscopic architecture as electron-selective contact for PSCs featuring 40 nm sized TiO2 beads endowed with mesopores of a few nanometer diameters is introduced. The bimodal pore distribution inherent to these films produces a very large contact area of 200 m2 g−1 whose access by the perovskite light absorber is facilitated by the interstitial voids between the particles. Modification of the TiO2 surface by CsBr further strengthens its interaction with the perovskite. As a result, photogenerated electrons are extracted rapidly producing a very high fill factor of close to 80% a VOC of 1.14 V and a PCE up to 21% with negligible hysteresis.",

keywords = "cesium doping, hysteresis, mesoporous TiO, passivation, perovskite solar cells, photovoltaics",

author = "Seo, {Ji Youn} and Ryusuke Uchida and Kim, {Hui Seon} and Yasemin Saygili and Jingshan Luo and Chris Moore and Julie Kerrod and Anthony Wagstaff and Mike Eklund and Robert McIntyre and Norman Pellet and Zakeeruddin, {Shaik M.} and Anders Hagfeldt and Michael Gr{\"a}tzel",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

month = apr,

day = "11",

doi = "10.1002/adfm.201705763",

language = "English",

volume = "28",

journal = "Advanced Functional Materials",

issn = "1616-301X",

publisher = "Wiley-VCH Verlag",

number = "15",

}

Seo, JY, Uchida, R, Kim, HS, Saygili, Y, Luo, J, Moore, C, Kerrod, J, Wagstaff, A, Eklund, M, McIntyre, R, Pellet, N, Zakeeruddin, SM, Hagfeldt, A & Grätzel, M 2018, 'Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO₂ Beads as Electron-Selective Contact', Advanced Functional Materials, vol. 28, no. 15, 1705763. https://doi.org/10.1002/adfm.201705763

TY - JOUR

T1 - Boosting the Efficiency of Perovskite Solar Cells with CsBr-Modified Mesoporous TiO2 Beads as Electron-Selective Contact

AU - Seo, Ji Youn

AU - Uchida, Ryusuke

AU - Kim, Hui Seon

AU - Saygili, Yasemin

AU - Luo, Jingshan

AU - Moore, Chris

AU - Kerrod, Julie

AU - Wagstaff, Anthony

AU - Eklund, Mike

AU - McIntyre, Robert

AU - Pellet, Norman

AU - Zakeeruddin, Shaik M.

AU - Hagfeldt, Anders

AU - Grätzel, Michael

PY - 2018/4/11

Y1 - 2018/4/11

N2 - Rapid extraction of photogenerated charge carriers is essential to achieve high efficiencies with perovskite solar cells (PSCs). Here, a new mesoscopic architecture as electron-selective contact for PSCs featuring 40 nm sized TiO2 beads endowed with mesopores of a few nanometer diameters is introduced. The bimodal pore distribution inherent to these films produces a very large contact area of 200 m2 g−1 whose access by the perovskite light absorber is facilitated by the interstitial voids between the particles. Modification of the TiO2 surface by CsBr further strengthens its interaction with the perovskite. As a result, photogenerated electrons are extracted rapidly producing a very high fill factor of close to 80% a VOC of 1.14 V and a PCE up to 21% with negligible hysteresis.

AB - Rapid extraction of photogenerated charge carriers is essential to achieve high efficiencies with perovskite solar cells (PSCs). Here, a new mesoscopic architecture as electron-selective contact for PSCs featuring 40 nm sized TiO2 beads endowed with mesopores of a few nanometer diameters is introduced. The bimodal pore distribution inherent to these films produces a very large contact area of 200 m2 g−1 whose access by the perovskite light absorber is facilitated by the interstitial voids between the particles. Modification of the TiO2 surface by CsBr further strengthens its interaction with the perovskite. As a result, photogenerated electrons are extracted rapidly producing a very high fill factor of close to 80% a VOC of 1.14 V and a PCE up to 21% with negligible hysteresis.

KW - cesium doping

KW - hysteresis

KW - mesoporous TiO

KW - passivation

KW - perovskite solar cells

KW - photovoltaics

UR - http://www.scopus.com/inward/record.url?scp=85038366185&partnerID=8YFLogxK

U2 - 10.1002/adfm.201705763

DO - 10.1002/adfm.201705763

M3 - Article

AN - SCOPUS:85038366185

SN - 1616-301X

VL - 28

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 15

M1 - 1705763

ER -