Highly stable and efficient planar perovskite solar cells using ternary metal oxide electron transport layers

Thambidurai, M.; Foo, Shini; Harikesh, Padinhare Cholakkal; Mathews, Nripan; Dang, Cuong

doi:10.1016/j.jpowsour.2019.227362

Cited by 27 publications

(14 citation statements)

References 42 publications

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“…The small semicircle in the high-frequency range corresponds to the charge transfer resistance (R 1 ), which is related to the charge transfer at the interface of the electrolyte/Pt counter electrode and FTO/TiO 2 interface. A larger semicircle in the low frequency region is mainly related to the charge recombination resistance (R 2 ) across the TiO 2 /electrolyte interface with a partial contribution from electron transport and accumulation in TiO 2 photoanode [44]. R 1 and R 2 values can be estimated from the diameter of the semicircles and resistance related to electron recombination (R 2 ) increases with Ru-doping up to 0.3 mol% and then it starts to decrease with the increase in concentration of Ru.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

Rajaramanan

Muthukumarasamy²,

Ravirajan

et al. 2020

Energies

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In this study, P25-titanium dioxide (TiO2) was doped with ruthenium (Ru) by systematically varying the Ru content at 0.15, 0.30, 0.45 and 0.6 mol%. The synthesized Ru-doped TiO2 nanomaterials have been characterized by X-ray diffraction (XRD), Raman spectroscopy, energy-dispersive X-ray (EDX) analysis, UV-visible (UV–Vis) spectroscopy, and electrochemical impedance (EIS) spectroscopy. The XRD patterns of undoped and Ru-doped TiO2 nanomaterials confirm the presence of mixed anatase and rutile phases of TiO2 while EDX spectrum confirms the presence of Ti, O and Ru. Further, UV-visible absorption spectra of doped TiO2 nanomaterial reveal a slight red shift on Ru-doping. The short circuit current density (JSC) of the cells fabricated using the Ru-doped TiO2 photoanode was found to be dependent on the amount of Ru present in TiO2. Optimized cells with 0.3 mol% Ru-doped TiO2 electrodes showed efficiency which is 20% more than the efficiency of the control cell (η = 5.8%) under stimulated illumination (100 mWcm−2, 1 sun) with AM 1.5 filter. The increase in JSC resulted from the reduced rate of recombination upon doping of Ru and this was confirmed by EIS analysis.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

Rajaramanan

Muthukumarasamy²,

Ravirajan

et al. 2020

Energies

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“…Ultraviolet photoelectron spectroscopy (UPS) was used to investigate the electronic properties and energy levels. [44] The low binding energy (onset) and high binding energy (cutoff) of the UPS spectra of the pristine and passivated perovskite films are displayed in Figure 1d,e,g,h. The optical bandgap of pristine and 10 mg mL À 1 TPP-passivated perovskite films are calculated using Tauc plot and shown in Figure 1f.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 1c represents the P 2p 3/2 and P 2p 1/2 peaks corresponding to binding energies of 132.68 and 133.60 eV. Ultraviolet photoelectron spectroscopy (UPS) was used to investigate the electronic properties and energy levels [44] . The low binding energy (onset) and high binding energy (cutoff) of the UPS spectra of the pristine and passivated perovskite films are displayed in Figure 1d,e,g,h.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Thermal Stability of Planar Perovskite Solar Cells Through Triphenylphosphine Interface Passivation

et al. 2022

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While extensive research has driven the rapid efficiency trajectory noted to date for organic-inorganic perovskite solar cells (PSCs), their thermal stability remains one of the key issues hindering their commercialization. Herein, a significant reduction in surface defects (a precursor to perovskite instability) could be attained by introducing triphenylphosphine (TPP), an effective Lewis base passivator, to the vulnerable perovskite/ spiro-OMeTAD interface. Not only did TPP passivation enable a high power conversion efficiency (PCE) of 20.22 % to be achieved, these devices also exhibited superior ambient and thermal stability. Unlike the pristine device, which exhibited a sharp descend to 16 % of its initial PCE on storing in relative humidity of 10 %, at 85 °C for more than 720 h, the TPPpassivated devices retained 71 % of its initial PCE. Hence, this study presents a facile yet excellent approach to attain highperforming yet thermally stable PSCs.

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“…Metal oxide CTLs, unlike organic materials such as the commonly used PEDOT:PSS HTL, are usually not hygroscopic, which are more robust to moisture, allowing them to be the protection layers and preventing the perovskite active layer from degradation in the humid ambient air. Nowadays, metal oxide CTLs have shown their outstanding chemical stability, which is one of the essential factors for achieving long-lifetime PSCs for future commercialization (You et al, 2016;Lei et al, 2019;Singh et al, 2019;Thambidurai et al, 2020). Figure 2 indicates the general properties of three different CTMs as discussed in this work.…”

Section: The Criteria Of Effective Metal Oxide Ctlsmentioning

confidence: 99%

Perspective on Predominant Metal Oxide Charge Transporting Materials for High-Performance Perovskite Solar Cells

Singh

Chu

2021

Front. Mater.

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Nowadays, the power conversion efficiency of organometallic mixed halide perovskite solar cells (PSCs) is beyond 25%. To fabricate highly efficient and stable PSCs, the performance of metal oxide charge transport layers (CTLs) is one of the key factors. The CTLs are employed in PSCs to separate the electrons and holes generated in the perovskite active layer, suppressing the charge recombination rate so that the charge collection efficiency can be increased at their respective electrodes. In general, engineering of metal oxide electron transport layers (ETLs) is found to be dominated in the research community to boost the performance of PSCs due to the resilient features of ETLs such as excellent electronic properties, high resistance to thermal temperature and moisture, ensuring good device stability as well as their high versatility in material preparation. The metal oxide hole transport layers in PSCs are recently intensively studied. The performance of PSCs is found to be very promising by using optimized hole transport materials. This review concisely discusses the evolution of some prevalent metal oxide charge transport materials (CTMs) including TiO2, SnO2, and NiOx, which are able to yield high-performance PSCs. The article begins with introducing the development trend of PSCs using different types of CTLs, pointing out the important criteria for metal oxides being effective CTLs, and then a variety of preparation methods for CTLs as employed by the community for high-performance PSCs are discussed. Finally, the challenges and prospects for future research direction toward scalable metal oxide CTM-based PSCs are delineated.

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Highly stable and efficient planar perovskite solar cells using ternary metal oxide electron transport layers

Cited by 27 publications

References 42 publications

Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

Enhanced Thermal Stability of Planar Perovskite Solar Cells Through Triphenylphosphine Interface Passivation

Perspective on Predominant Metal Oxide Charge Transporting Materials for High-Performance Perovskite Solar Cells

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