Efficient fully laser-patterned flexible perovskite modules and solar cells based on low-temperature solution-processed SnO2/mesoporous-TiO2 electron transport layers

Dagar, Janardan; Castro‐Hermosa, Sergio; Gasbarri, Matteo; Palma, Alessandro Lorenzo; Cinà, Lucio; Matteocci, Fabio; Calabrò, Emanuele; Carlo, Aldo Di; Brown, Thomas M.

doi:10.1007/s12274-017-1896-5

Cited by 133 publications

(115 citation statements)

References 59 publications

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“…However, n‐i‐p devices often exhibit substantial discrepancies between current–voltage measurements—hysteresis—in different scan directions . These discrepancies between the forward and reverse J–V measurements in PSCs have been proposed to originate from charge carrier recombination, unbalanced charge transport, capacitive effects, and ion migration at the interface of the transport layer (TL) and the perovskite absorber layer . Ionic defects at metal‐oxide/perovskite interfaces and defect accumulation/migration have been suggested to be the origin of current–voltage hysteresis .…”

Section: Introductionmentioning

confidence: 99%

Alkali Salts as Interface Modifiers in n‐i‐p Hybrid Perovskite Solar Cells

et al. 2019

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After demonstration of a 23% power conversion efficiency, a high operational stability is the next most important scientific and technological challenge in perovskite solar cells (PSCs). A potential failure mechanism is tied to a bias‐induced ion migration, which causes current–voltage hysteresis and a decay in the device performance over time. Herein, alkali salts are shown to mitigate hysteresis and stabilize device performance in n‐i‐p hybrid planar PSCs. Different alkali salts of potassium chloride, iodide, and nitrate as well as sodium chloride and iodide are deposited from aqueous solution onto the n‐type contact, based on SnO2, prior to deposition of the perovskite absorber Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3. Introduction of potassium‐based alkali salts suppresses the current–voltage hysteresis and stabilizes the operational device stability at the maximum power point. This is attributed to the suppression of hole trapping at the n‐type selective transport layer (SnO2)/perovskite interface observed by surface photovoltage spectroscopy, which is interpreted to reduce interfacial recombination and improve charge carrier extraction. The best and most stable performance of 19% is achieved using potassium nitrate as the interface modifier. Devices with higher and more stable performance exhibit substantially lower current transients, analyzed during maximum power point tracking.

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Section: Introductionmentioning

confidence: 99%

Alkali Salts as Interface Modifiers in n‐i‐p Hybrid Perovskite Solar Cells

et al. 2019

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“…Another important large area FPSCs, flexible PV modules, have also been reported by several groups since the first flexible perovskite PV module was reported in 2015 . Though their performances are unsatisfactory with only PCEs of 4.30–12.40%, flexible perovskite PV modules must be one of the most popular focus for future researches and commercial applications as they can robustly improve the output power and PCEs of the devices, as well as incorporate the advantages of light weight, flexibility, easy of transportation, installation, and being modularized into FPSCs as being discussed above. Definitely, a lot of efforts must still be done in the scalable fabrication of FPSCs before they can be put into commercial application.…”

Section: Conclusion and Perspectivementioning

confidence: 95%

Recent Progress of Flexible Perovskite Solar Cells

Xie

Yin

Guo

et al. 2019

Physica Rapid Research Ltrs

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Flexible solar cells have been considered as a promising photovoltaic (PV) technology due to their intrinsic advantages such as lightweight and bendability, which make them very convenient for transportation, installation, and integration with architectures and wearable electricity‐generating devices. As a novel PV technology being compatible with roll‐to‐roll fabrication, flexible perovskite solar cells (FPSCs) have achieved a great progress within the past few years, partially due to the superior photoelectronic properties of the halide perovskite absorber and the easy fabrication of the device. As a result, the champion power conversion efficiency of the FPSCs has exceeded 18% recently. In this review, the recent developments of FPSCs are summarized and discussed in the following four aspects: perovskite absorbers, flexible substrates, transparent conductive electrodes, and carrier transport layers, which are the main components for a FPSC device. The flexibility, stability, and other properties are also discussed in terms of the specialized FPSC devices. Finally, a rough prediction for the future development of FPSCs is provided at the end of this review.

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“…However, cPPV devices usually possess higher series resistance (R S ) due to the lower conductivity of the carbon electrode, and therefore inferior one sun performance as compared to other device architectures. Both conventional and inverted PPV (iPPV) devices have been studied under indoor conditions, with remarkable P max under indoor conditions . However, their indoor performance could be poor if there is no further optimization of the electron transporting layer (ETL).…”

Section: Device Parameters Of the Best Ppv Cells Measured Under Diffementioning

confidence: 99%

“…Apart from the leakage current, the shunt resistance ( R Sh ) is perhaps another indicative parameter to look at for low light applications. Using either organic solar cells or PPV cells, a few works suggested that a high shunt resistance is required for devices to perform well under low light intensity . However, Lechêne et al showed that the shunt resistance itself may not be enough to determine how a PV device performs under low light level.…”

Section: Device Parameters Of the Best Ppv Cells Measured Under Diffementioning

confidence: 99%

Outstanding Indoor Performance of Perovskite Photovoltaic Cells – Effect of Device Architectures and Interlayers

et al. 2018

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Indoor photovoltaics is one of the best sustainable and reliable energy source for low power consumption electronics such as the rapidly growing Internet of Things. Perovskite photovoltaic (PPV) cells with three benchmark device architectures – mesoporous PPV (mPPV) and inverted PPV (iPPV) with alternative hole transporting layers (HTLs), and carbon‐based PPV (cPPV) are studied under a simulated indoor environment. The mPPV cell using typical Spiro‐OMeTAD as the HTL shows the highest maximum power density (Pmax) of 19.9 μW cm−2 under 200 lux and 115.6 μW cm−2 under 1000 lux (without masking), which is among the best of the indoor PV. Interestingly, when PTAA is used as the HTL in the mPPV cell, the Pmax drops to almost zero under indoor light environment while its performance under one sun remains similar. On the other hand, when PEDOT:PSS is replaced by Poly‐TPD as HTL in the iPPV cell, the Pmax under indoor light improves significantly and is comparable to that of the best mPPV cell. This significant difference in indoor performance correlates well with their leakage current. The HTL‐free cPPV cell, prepared by fully up‐scalable techniques, shows a promising Pmax of 16.3 and 89.4 μW cm−2 under 200 and 1000 lux, respectively. A practical scale 5 × 5cm2 cPPV module is fabricated as a demonstration for real applications.

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Efficient fully laser-patterned flexible perovskite modules and solar cells based on low-temperature solution-processed SnO2/mesoporous-TiO2 electron transport layers

Cited by 133 publications

References 59 publications

Alkali Salts as Interface Modifiers in n‐i‐p Hybrid Perovskite Solar Cells

Alkali Salts as Interface Modifiers in n‐i‐p Hybrid Perovskite Solar Cells

Recent Progress of Flexible Perovskite Solar Cells

Outstanding Indoor Performance of Perovskite Photovoltaic Cells – Effect of Device Architectures and Interlayers

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