Enhanced Charge Collection with Passivation Layers in Perovskite Solar Cells

Lee, Yong Hui; Luo, Jingshan; Son, Min Kyu; Gao, Peng; Cho, Kyung Taek; Seo, Ji‐Youn; Zakeeruddin, Shaik M.; Grätzel, Michaël; Nazeeruddin, Mohammad Khaja

doi:10.1002/adma.201505140

Cited by 158 publications

(114 citation statements)

References 46 publications

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“…This higher V oc value of planar devices can be associated with the lower probability of charge recombination as compared to the porous structured PSCs. These results are very consistent with recent studies on CH 3 NH 3 PbI 3 ‐based planar PSC devices 25, 58, 59. Considering the PCEs of the devices, the TiO 2 NF (≈400 nm) film was chosen for further investigations and device fabrication.…”

Section: Resultssupporting

confidence: 92%

Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

et al. 2017

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1D semiconducting oxides are unique structures that have been widely used for photovoltaic (PV) devices due to their capability to provide a direct pathway for charge transport. In addition, carbon nanotubes (CNTs) have played multifunctional roles in a range of PV cells because of their fascinating properties. Herein, the influence of CNTs on the PV performance of 1D titanium dioxide nanofiber (TiO2 NF) photoelectrode perovskite solar cells (PSCs) is systematically explored. Among the different types of CNTs, single‐walled CNTs (SWCNTs) incorporated in the TiO2 NF photoelectrode PSCs show a significant enhancement (≈40%) in the power conversion efficiency (PCE) as compared to control cells. SWCNTs incorporated in TiO2 NFs provide a fast electron transfer within the photoelectrode, resulting in an increase in the short‐circuit current (J sc) value. On the basis of our theoretical calculations, the improved open‐circuit voltage (V oc) of the cells can be attributed to a shift in energy level of the photoelectrodes after the introduction of SWCNTs. Furthermore, it is found that the incorporation of SWCNTs into TiO2 NFs reduces the hysteresis effect and improves the stability of the PSC devices. In this study, the best performing PSC device constructed with SWCNT structures achieves a PCE of 14.03%.

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Section: Resultssupporting

confidence: 92%

Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

et al. 2017

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“…From the XRD patterns of PbI 2 films, the main reflections of (001) at 12.62°, (002) at 25.4°, (003) at 38.54°, and (004) at 52.30° are in agreement with the previous reported work12131415. The FAI gives reflections at 14.07°, 28.36°, 31.82°, and 43.14°, which are assigned as the (110), (220), (310) and (330) planes, respectively, and it shows an orthorhombic crystal structure with preferred a orientation in the (110) direction16.…”

Section: Resultssupporting

confidence: 90%

Bandgap tuning of mixed organic cation utilizing chemical vapor deposition process

Kim

Teridi

et al. 2016

Sci Rep

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Bandgap tuning of a mixed organic cation perovskite is demonstrated via chemical vapor deposition process. The optical and electrical properties of the mixed organic cation perovskite can be manipulated by varying the growth time. A slight shift of the absorption band to shorter wavelengths is demonstrated with increasing growth time, which results in the increment of the current density. Hence, based on the optimized growth time, our device exhibits an efficiency of 15.86% with negligible current hysteresis.

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“…6 The combination of these two observations, high carrier mobility and reduced internal recombination, lead to consider that the most important part of carrier recombination processes are more likely to occur at the interfaces between the perovskite absorber and extracting layers. [7][8][9] According to this assumption, carrier losses by nonradiative recombination at the outer contacts play a crucial role determining the performance of perovskite solar cells, affecting both short circuit current and open circuit voltage. However, the quantification of the diminution in photovoltaic parameters in relation to interfacial electronic processes is still unsolved.…”

mentioning

confidence: 99%

Investigating the Consistency of Models for Water Splitting Systems by Light and Voltage Modulated Techniques

Bertoluzzi

Bisquert

2016

J. Phys. Chem. Lett.

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The large diffusion lengths recurrently measured in perovskite single crystals and films signals small bulk nonradiative recombination flux and locate the dominant carrier recombination processes at the outer interfaces. Surface recombination largely determines the photovoltaic performance, governing reductions in short circuit current and open circuit voltage. Quantification of recombination losses is necessary to reach full understanding of the solar cell operating principles. Complete impedance model is given which connects capacitive and resistive processes to the electronic kinetics at the interfaces. Carrier collection losses affecting the photocurrent have been determined to equal 1%. Photovoltage loss is linked to the decrease in surface hole density, producing 0.3 V-reduction with respect to the ideal radiative limit. Our approach enables a comparison among different structures, morphologies and processing strategies of passivation and buffer layers. TOC figure

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Enhanced Charge Collection with Passivation Layers in Perovskite Solar Cells

Cited by 158 publications

References 46 publications

Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

Bandgap tuning of mixed organic cation utilizing chemical vapor deposition process

Investigating the Consistency of Models for Water Splitting Systems by Light and Voltage Modulated Techniques

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Enhanced Charge Collection with Passivation Layers in Perovskite Solar Cells

Cited by 158 publications

References 46 publications

Carbon Nanotubes in TiO2 Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

Carbon Nanotubes in TiO2 Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

Bandgap tuning of mixed organic cation utilizing chemical vapor deposition process

Investigating the Consistency of Models for Water Splitting Systems by Light and Voltage Modulated Techniques

Contact Info

Product

Resources

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Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells

Carbon Nanotubes in TiO₂ Nanofiber Photoelectrodes for High‐Performance Perovskite Solar Cells