Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

Lai Hung Lai; Mark J. Speirs; Feng Kuei Chang; Laura Piveteau; Maksym V. Kovalenko; Jen Sue Chen; Jih Jen Wu; Maria A. Loi

doi:10.1063/1.4934946

Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

Lai Hung Lai, Mark J. Speirs, Feng Kuei Chang, Laura Piveteau, Maksym V. Kovalenko, Jen Sue Chen, Jih Jen Wu, Maria A. Loi

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

17 Citations (Scopus)

Abstract

We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N₂ glovebox.

Original language	English
Article number	183901
Journal	Applied Physics Letters
Volume	107
Issue number	18
DOIs	https://doi.org/10.1063/1.4934946
Publication status	Published - 2015 Nov 2

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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title = "Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer",

abstract = "We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N2 glovebox.",

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T1 - Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

AU - Lai, Lai Hung

AU - Speirs, Mark J.

AU - Chang, Feng Kuei

AU - Piveteau, Laura

AU - Kovalenko, Maksym V.

AU - Chen, Jen Sue

AU - Wu, Jih Jen

AU - Loi, Maria A.

PY - 2015/11/2

Y1 - 2015/11/2

N2 - We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N2 glovebox.

AB - We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N2 glovebox.

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Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

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