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Low-temperature-processed efficient semi-transparent planar perovskite solar cells for bifacial and tandem applications.

Fu F, Feurer T, Jäger T, Avancini E, Bissig B, Yoon S, Buecheler S, Tiwari AN - Nat Commun (2015)

Bottom Line: Semi-transparent perovskite solar cells are highly attractive for a wide range of applications, such as bifacial and tandem solar cells; however, the power conversion efficiency of semi-transparent devices still lags behind due to missing suitable transparent rear electrode or deposition process.We employ high-mobility hydrogenated indium oxide as transparent rear electrode by room-temperature radio-frequency magnetron sputtering, yielding a semi-transparent solar cell with steady-state efficiency of 14.2% along with 72% average transmittance in the near-infrared region.With such semi-transparent devices, we show a substantial power enhancement when operating as bifacial solar cell, and in combination with low-bandgap copper indium gallium diselenide we further demonstrate 20.5% efficiency in four-terminal tandem configuration.

View Article: PubMed Central - PubMed

Affiliation: Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland.

ABSTRACT
Semi-transparent perovskite solar cells are highly attractive for a wide range of applications, such as bifacial and tandem solar cells; however, the power conversion efficiency of semi-transparent devices still lags behind due to missing suitable transparent rear electrode or deposition process. Here we report a low-temperature process for efficient semi-transparent planar perovskite solar cells. A hybrid thermal evaporation-spin coating technique is developed to allow the introduction of PCBM in regular device configuration, which facilitates the growth of high-quality absorber, resulting in hysteresis-free devices. We employ high-mobility hydrogenated indium oxide as transparent rear electrode by room-temperature radio-frequency magnetron sputtering, yielding a semi-transparent solar cell with steady-state efficiency of 14.2% along with 72% average transmittance in the near-infrared region. With such semi-transparent devices, we show a substantial power enhancement when operating as bifacial solar cell, and in combination with low-bandgap copper indium gallium diselenide we further demonstrate 20.5% efficiency in four-terminal tandem configuration.

No MeSH data available.


Related in: MedlinePlus

Photovoltaic and optical properties of semi-transparent planar perovskite solar cells with different MoO3 thickness.(a–d) The photovoltaic parameters of semi-transparent planar solar cells as a function of MoO3 thickness with In2O3:H as rear transparent electrode. The photovoltaic performances of device with ZnO:Al rear contact are also presented for comparison. Average values and s.d. are given from 5 to 9 cells (cell area: 0.3 cm2 for In2O3:H; and 0.15 cm2 for ZnO:Al). The triangle symbol represents the highest value for each batch. The J–V measurement conditions were the same as in Fig. 2. (e) The transmission (T) and reflection (R) of semi-transparent cells with various MoO3 thicknesses. The solid and dashed lines represent transmission and reflection, respectively. The perovskite is grown from 140 nm PbI2 precursor. The MoO3 thickness used here is determined from SEM images.
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f3: Photovoltaic and optical properties of semi-transparent planar perovskite solar cells with different MoO3 thickness.(a–d) The photovoltaic parameters of semi-transparent planar solar cells as a function of MoO3 thickness with In2O3:H as rear transparent electrode. The photovoltaic performances of device with ZnO:Al rear contact are also presented for comparison. Average values and s.d. are given from 5 to 9 cells (cell area: 0.3 cm2 for In2O3:H; and 0.15 cm2 for ZnO:Al). The triangle symbol represents the highest value for each batch. The J–V measurement conditions were the same as in Fig. 2. (e) The transmission (T) and reflection (R) of semi-transparent cells with various MoO3 thicknesses. The solid and dashed lines represent transmission and reflection, respectively. The perovskite is grown from 140 nm PbI2 precursor. The MoO3 thickness used here is determined from SEM images.

Mentions: The degree of ion bombardment is more severe during the deposition of ZnO:Al than that in In2O3:H due to the different sputter geometries, lower total pressure and shorter target-to-substrate distance48, as illustrated in Supplementary Fig. 5. In both devices, 8.7 nm MoO3 is evaporated as buffer layer, and perovskite is grown from 120 nm-thick PbI2 precursor. As can be seen in Fig. 3a,d, the average Voc, Jsc, FF and η of devices with ZnO:Al are much lower than that of the ones with In2O3:H, and the s.d. is also larger in case of ZnO:Al. Notably, a perovskite solar cell with 10.1% efficiency (Supplementary Fig. 6) is achieved by directly depositing In2O3:H on top of Spiro-OMeTAD. This is the highest value with direct deposition of TCO on top of the hole transporting layer (HTL) as back electrode without buffer layer, indicating that direct sputtered TCO might allow to achieve high-efficiency if the ion bombardment is suppressed during deposition.


Low-temperature-processed efficient semi-transparent planar perovskite solar cells for bifacial and tandem applications.

Fu F, Feurer T, Jäger T, Avancini E, Bissig B, Yoon S, Buecheler S, Tiwari AN - Nat Commun (2015)

Photovoltaic and optical properties of semi-transparent planar perovskite solar cells with different MoO3 thickness.(a–d) The photovoltaic parameters of semi-transparent planar solar cells as a function of MoO3 thickness with In2O3:H as rear transparent electrode. The photovoltaic performances of device with ZnO:Al rear contact are also presented for comparison. Average values and s.d. are given from 5 to 9 cells (cell area: 0.3 cm2 for In2O3:H; and 0.15 cm2 for ZnO:Al). The triangle symbol represents the highest value for each batch. The J–V measurement conditions were the same as in Fig. 2. (e) The transmission (T) and reflection (R) of semi-transparent cells with various MoO3 thicknesses. The solid and dashed lines represent transmission and reflection, respectively. The perovskite is grown from 140 nm PbI2 precursor. The MoO3 thickness used here is determined from SEM images.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4696455&req=5

f3: Photovoltaic and optical properties of semi-transparent planar perovskite solar cells with different MoO3 thickness.(a–d) The photovoltaic parameters of semi-transparent planar solar cells as a function of MoO3 thickness with In2O3:H as rear transparent electrode. The photovoltaic performances of device with ZnO:Al rear contact are also presented for comparison. Average values and s.d. are given from 5 to 9 cells (cell area: 0.3 cm2 for In2O3:H; and 0.15 cm2 for ZnO:Al). The triangle symbol represents the highest value for each batch. The J–V measurement conditions were the same as in Fig. 2. (e) The transmission (T) and reflection (R) of semi-transparent cells with various MoO3 thicknesses. The solid and dashed lines represent transmission and reflection, respectively. The perovskite is grown from 140 nm PbI2 precursor. The MoO3 thickness used here is determined from SEM images.
Mentions: The degree of ion bombardment is more severe during the deposition of ZnO:Al than that in In2O3:H due to the different sputter geometries, lower total pressure and shorter target-to-substrate distance48, as illustrated in Supplementary Fig. 5. In both devices, 8.7 nm MoO3 is evaporated as buffer layer, and perovskite is grown from 120 nm-thick PbI2 precursor. As can be seen in Fig. 3a,d, the average Voc, Jsc, FF and η of devices with ZnO:Al are much lower than that of the ones with In2O3:H, and the s.d. is also larger in case of ZnO:Al. Notably, a perovskite solar cell with 10.1% efficiency (Supplementary Fig. 6) is achieved by directly depositing In2O3:H on top of Spiro-OMeTAD. This is the highest value with direct deposition of TCO on top of the hole transporting layer (HTL) as back electrode without buffer layer, indicating that direct sputtered TCO might allow to achieve high-efficiency if the ion bombardment is suppressed during deposition.

Bottom Line: Semi-transparent perovskite solar cells are highly attractive for a wide range of applications, such as bifacial and tandem solar cells; however, the power conversion efficiency of semi-transparent devices still lags behind due to missing suitable transparent rear electrode or deposition process.We employ high-mobility hydrogenated indium oxide as transparent rear electrode by room-temperature radio-frequency magnetron sputtering, yielding a semi-transparent solar cell with steady-state efficiency of 14.2% along with 72% average transmittance in the near-infrared region.With such semi-transparent devices, we show a substantial power enhancement when operating as bifacial solar cell, and in combination with low-bandgap copper indium gallium diselenide we further demonstrate 20.5% efficiency in four-terminal tandem configuration.

View Article: PubMed Central - PubMed

Affiliation: Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland.

ABSTRACT
Semi-transparent perovskite solar cells are highly attractive for a wide range of applications, such as bifacial and tandem solar cells; however, the power conversion efficiency of semi-transparent devices still lags behind due to missing suitable transparent rear electrode or deposition process. Here we report a low-temperature process for efficient semi-transparent planar perovskite solar cells. A hybrid thermal evaporation-spin coating technique is developed to allow the introduction of PCBM in regular device configuration, which facilitates the growth of high-quality absorber, resulting in hysteresis-free devices. We employ high-mobility hydrogenated indium oxide as transparent rear electrode by room-temperature radio-frequency magnetron sputtering, yielding a semi-transparent solar cell with steady-state efficiency of 14.2% along with 72% average transmittance in the near-infrared region. With such semi-transparent devices, we show a substantial power enhancement when operating as bifacial solar cell, and in combination with low-bandgap copper indium gallium diselenide we further demonstrate 20.5% efficiency in four-terminal tandem configuration.

No MeSH data available.


Related in: MedlinePlus