MgO Nanoparticle Modified Anode for Highly Efficient SnO<sub>2</sub>‐Based Planar Perovskite Solar Cells

Ma, Junjie; Yang, Guang; Qin, Minchao; Zheng, Xiaolu; Lei, Hongwei; Chen, Cong; Chen, Zhiliang; Guo, Yaxiong; Han, Hongwei; Zhao, Xingzhong; Fang, Guojia

doi:10.1002/advs.201700031

Cited by 189 publications

(143 citation statements)

References 59 publications

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“…Moreover, the arc at the low‐frequency region is corresponding to the recombination resistance ( R rec ) and the chemical capacitance ( C rec ), which are mainly attributed to the charge transporting from each interface, such as HTM/perovskite and perovskite/SnO 2. The series resistance ( R s ) is related to the resistance of external circuits and substrates, etc. It is clear that the device with dye layer shows larger R rec (74 037 Ω) than that of without dye layer device (14 178 Ω), which indicates a more efficient charge‐transfer property and highly suppressed charge recombination in the device with the dye layer.…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

et al. 2019

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Inorganic lead halide perovskites are attracting increasing attention due to their much better thermal stability than the organic–inorganic hybrid perovskite materials. Thus, the low power conversion efficiency (PCE) is a key issue for the inorganic lead halide perovskite solar cells (PSCs). This is mainly due to their wider bandgap and larger energy loss (Eloss) in the devices. Herein, for solving this issue, a dye molecule‐assisted engineering using the dye of 5,15‐bis(2,6‐dioctoxyphenyl)‐10‐(bis(4‐hexylphenyl)‐amino‐20‐4‐carboxyphenylethynyl)porphyrinato]zinc(II) (YD2‐o‐C8) is demonstrated. Results indicate that this molecule has a bifunctional effect, not only as a co‐sensitization layer for CsPbIBr2 with broader absorption spectrum but also reduces the Eloss by interface passivation. Specifically, the light absorption range of the photoactive layer is broadened from 600 to nearly 680 nm. At the same time, the interfacial charge recombination is highly reduced. After optimizing, the champion PCE is enhanced from 7.02% to 10.13%, and record‐high open‐circuit voltage (VOC) of 1.37 V and short‐circuit currents (JSC) of 12.05 mA cm−2 are achieved. This study opens a simple and efficient way to improve the efficiency of inorganic PSCs.

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Section: Resultsmentioning

confidence: 99%

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

et al. 2019

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“…Petrozza and co-workers demonstrated that insufficient charge extraction from the perovskite film to the ETL can be remedied using a TiO 2 /PCBM bilayer ETL, and a PCE of 17.9% was achieved. [21] Numerous other efforts have been undertaken to enhance the performance of PSCs with bilayer ETLs, such as SnO 2 @TiO 2 , [22] SnO 2 /PCBM, [23] An electron-transport layer (ETL) with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs [24] TiO 2 /In 2 O 3 , [25] MgO/TiO 2 , [17] TiO 2 /ZnO, [26] and ZrO 2 /TiO 2 . [21] Numerous other efforts have been undertaken to enhance the performance of PSCs with bilayer ETLs, such as SnO 2 @TiO 2 , [22] SnO 2 /PCBM, [23] An electron-transport layer (ETL) with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs [24] TiO 2 /In 2 O 3 , [25] MgO/TiO 2 , [17] TiO 2 /ZnO, [26] and ZrO 2 /TiO 2 .…”

Section: Doi: 101002/adma201905766mentioning

confidence: 99%

Gradient Energy Alignment Engineering for Planar Perovskite Solar Cells with Efficiency Over 23%

et al. 2020

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Organic-inorganic halide perovskite solar cells (PSCs) have a great potential for commercialization owing to their low cost and superior performance. [1] Over the past decade, the power conversion efficiency (PCE) of PSCs has increased from 3.8% [2] to 25.2%, [3] approaching the record efficiency of 26.7% of crystalline silicon solar cells, [4] and becoming one of the most promising candidates for the nextgeneration efficient and low-cost photovoltaic devices. [5] For example, Seok and co-workers introduced additional iodide intoprecursor solutions, resulting in a certified PCE of 22.1%. [6] Recently, Kim et al. investigated the effects of methylammonium chloride (MACl) on the performance of perovskite films and fabricated a device that achieved a certified PCE of 23.5%. [7] It is important to note that all these efficient devices were fabricated with high-temperature-processed TiO 2 mesoporous structures, thus limiting their widespread application. Developing low-temperature-processed electron-transport layer (ETL) [8] for planar structure devices is of great importance. [9] Among them, TiO 2 , [10] SnO 2 , [11] and [6]-phenyl-C 61 -butyric acid methyl ester (PCBM) [12] are the most commonly used ones.The lower efficiency of devices based on planar structures is closely related to insufficient charge extraction [13] and imperfect interfacial band alignment. [14] The insufficient charge extraction between perovskite and ETL can result in charge accumulation, which negatively affects device performance. [15] Therefore, sufficient charge extraction is one of the most important contributors for device efficiency. [16] Recently, researchers have focused on the use of bilayer ETL, [17] and the bilayer stack structure has been demonstrated to be effective for improving device efficiency. As early as 2014, [18] Snaith and co-workers have shown that PSCs with C 60 -modified TiO 2 can significantly enhance electron transfer and result in a largely improved performance of 17.3% and a decrease in hysteretic behavior. Petrozza and co-workers demonstrated that insufficient charge extraction from the perovskite film to the ETL can be remedied using a TiO 2 /PCBM bilayer ETL, and a PCE of 17.9% was achieved. [19] Recently, Choi and co-workers achieved a PCE of 21.1% using SnO 2 @TiO 2 ETL, [20] and Kong and co-workers showed a PCE of 21.4% using the same type of ETL. [21] Numerous other efforts have been undertaken to enhance the performance of PSCs with bilayer ETLs, such as SnO 2 @TiO 2 , [22] SnO 2 /PCBM, [23] An electron-transport layer (ETL) with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs). However, interfacial energy level mismatch limits the electrical performance of PSCs, particularly the open-circuit voltage (V OC ). Herein, a simple low-temperature-processed In 2 O 3 /SnO 2 bilayer ETL is developed and used for fabricating a new PSC device. The presence of In 2 O 3 results in uniform, compact, and low-trap-density perovskite films. Moreover, the conduction...

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“…[12,13] Ah ighly crystalline SnO 2 film is essential for good chargee xtraction and transport. [18] However, interface engineering could not eliminate the inherentd efects in the crystallites. [14] Engineering the interface between ETL and the perovskite has been provent o resolve the carrier recombination issue and improve the device performance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells

Liu

et al. 2018

ChemSusChem

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Low-temperature solution-processed SnO as a promising electron-transport material for planar perovskite solar cells (PSCs) has attracted particular attention because of its outstanding properties such as high optical transparency or high electron mobility. However, low-temperature sol-gel processes used in the synthesis are inevitably affected by the humidity of the atmosphere, which results in a wide distribution in the performance of the prepared PSCs owing to the inability to control crystallinity and defects. Herein, a highly crystalline SnO film is synthesized using a simple water bath post-treatment, which can remove the surface residuals of SnCl on the SnO films, which is beneficial for the interface charge transport from the perovskite to the SnO electron-transport layer. An improved performance of the PSCs can be easily obtained applying this treatment, giving rise to a high power conversion efficiency (PCE) of 19.17 %, much higher than that of the pristine SnO -based device (17.59 %). Most importantly, the reproducibility of the devices has been greatly improved, independent of the environmental humidity. Therefore, the enhanced crystallinity of SnO has shown promise for future commercial PSC applications: 5 cm×5 cm PSC modules have achieved a PCE of 16.16 %.

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MgO Nanoparticle Modified Anode for Highly Efficient SnO₂‐Based Planar Perovskite Solar Cells

Cited by 189 publications

References 59 publications

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

Gradient Energy Alignment Engineering for Planar Perovskite Solar Cells with Efficiency Over 23%

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells

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MgO Nanoparticle Modified Anode for Highly Efficient SnO2‐Based Planar Perovskite Solar Cells

Cited by 189 publications

References 59 publications

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr2 Perovskite Solar Cells with Efficiency Exceeding 10%

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr2 Perovskite Solar Cells with Efficiency Exceeding 10%

Gradient Energy Alignment Engineering for Planar Perovskite Solar Cells with Efficiency Over 23%

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO2 for Highly Reproducible Planar Perovskite Solar Cells

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Product

Resources

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MgO Nanoparticle Modified Anode for Highly Efficient SnO₂‐Based Planar Perovskite Solar Cells

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

Bifunctional Dye Molecule in All‐Inorganic CsPbIBr₂ Perovskite Solar Cells with Efficiency Exceeding 10%

Enhanced Crystallinity of Low‐Temperature Solution‐Processed SnO₂ for Highly Reproducible Planar Perovskite Solar Cells