Interface modification of CH 3 NH 3 PbI 3 /PCBM by pre-heat treatment for efficiency enhancement of perovskite solar cells

Sutthana, Sutthipoj; Hongsith, Kritsada; Ruankham, Pipat; Wongratanaphisan, Duangmanee; Gardchareon, Atcharawon; Phadungdhitidhada, Surachet; Boonyawan, Dheerawan; Kumnorkaew, Pisist; Tuantranont, Adisorn; Choopun, Supab

doi:10.1016/j.cap.2017.01.015

Cited by 17 publications

(5 citation statements)

References 26 publications

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“…However, upon further increasing the concentration of the PC 61 BM material to 70 mg/mL, many cracks and pinholes were observed, as shown in Figure 2 d. In general, due to the strong Van der Waals forces between the molecules of the PC 61 BM fullerene derivative, the distance between the PC 61 BM molecules decreased with an increase in the PC 61 BM concentration [ 29 ]. Therefore, the probability of the aggregation of the PC 61 BM molecules was further enhanced [ 30 ]. Consequently, cracks and pinholes were easily generated and clearly observable on the surface of the PC 61 BM ETL with a concentration of 70 mg/mL.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

et al. 2023

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Due to its high carrier mobility and electron transmission, the phenyl-C61-butyric acid methyl ester (PC61BM) is usually used as an electron transport layer (ETL) in perovskite solar cell (PSC) configurations. However, PC61BM films suffer from poor coverage on perovskite active layers because of their low solubility and weak adhesive ability. In this work, to overcome the above-mentioned shortcomings, 30 nm thick PC61BM ETLs with different concentrations were modeled. Using a 30 nm thick PC61BM ETL with a concentration of 50 mg/mL, the obtained performance values of the PSCs were as follows: an open-circuit voltage (Voc) of 0.87 V, a short-circuit current density (Jsc) of 20.44 mA/cm2, a fill factor (FF) of 70.52%, and a power conversion efficiency (PCE) of 12.54%. However, undesired fine cracks present on the PC61BM surface degraded the performance of the resulting PSCs. To further improve performance, multiple different thicknesses of ZnO interface layers were deposited on the PC61BM ETLs to release the fine cracks using a thermal evaporator. In addition to the pavement of fine cracks, the ZnO interface layer could also function as a hole-blocking layer due to its larger highest occupied molecular orbital (HOMO) energy level. Consequently, the PCE was improved to 14.62% by inserting a 20 nm thick ZnO interface layer in the PSCs.

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Section: Resultsmentioning

confidence: 99%

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

et al. 2023

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“…In Figure S3(a), we found dark currents of each photodetectors were all between 10 -7 A and 10 -8 A under the bias voltage of 0.6 V. Figure S3( with oxygen or water because of its hydrophobicity. [25][26] After 48h, the photoresponse for UV light was also measured, as shown in Figure S2. Figure 7b shows the rise time is less than 123ms and the fall time is less than 180ms.…”

Section: Resultsmentioning

confidence: 99%

Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability

Wang

Zhang

et al. 2018

Organic Electronics

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In this work, an anti-solvent process was used to fabricate a perovskite-PCBM bulk heterojunction, in which PCBM diffused in CH 3 NH 3 PbI 3 and passivated grain boundary defects. Different concentrations of PCBM were studied in this paper. When a low concentration (5mg/ml, 10mg/ml or 15mg/ml) of PCBM was used, the PCBM-CH 3 NH 3 PbI 3 transition layer provided efficient electron collection. With the increase of the concentration of PCBM, a thicker PCBM layer was formed in the bulk heterojunction. Such a thick PCBM resulted in rough perovskite morphology and low photo-carrier collection efficiency. SEM images and metallographic microscope images confirmed that the PCBM upper layer gradually covered grain boundaries of perovskite films with the increase of the PCBM concentration. On the other hand, low concentrations of PCBM improved the light absorption and crystallinity of CH 3 NH 3 PbI 3 films. The PCBM/perovskite heterojunction exhibited a high UV *Manuscript Click here to view linked References responsivity of 0.18 AW-1 and a response time less than 123ms. This research provides a way to improve the quality of perovskite films and the performance of perovskite photodetectors.

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“…The aligned PCBM is expected to facilitate electron transport over short distances, resulting in improved conductivity. 37,38 Figure 2f presents the conductivities of SnO 2 , LT-PCBM, and HT-PCBM films of the same thickness. While the conductivity of PCBM is lower than that of pure SnO 2 , high-temperature annealed PCBM films achieved a similar conductivity of SnO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Figure S5 shows diffraction peaks at 10.9° and 17.5° appearing in the XRD spectra of high temperature annealed PCBM film, which indicates that PCBM has crystallinity at high temperature of 150° or higher. The aligned PCBM is expected to facilitate electron transport over short distances, resulting in improved conductivity. , Figure f presents the conductivities of SnO 2 , LT-PCBM, and HT-PCBM films of the same thickness. While the conductivity of PCBM is lower than that of pure SnO 2 , high-temperature annealed PCBM films achieved a similar conductivity of SnO 2 .…”

Section: Resultsmentioning

confidence: 99%

Enhancing Performance and Stability of Sn–Pb Perovskite Solar Cells with Oriented Phenyl-C₆₁-Butyric Acid Methyl Ester Layer via High-Temperature Annealing

Song,

Jang,

Seo

et al. 2024

ACS Nano

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Phenyl-C 61 -butyric acid methyl ester (PCBM) can be used as a passivation material in perovskite solar cells (PeSCs) in order to reduce the trap site of the perovskite. Here, we show that a thick PCBM layer can form a smoother surface on the SnO 2 substrate, improving the grain size and reducing the microstrain of the perovskite. High-temperature annealing treatment of PCBM layer not only increases its solvent resistance to perovskite precursor or antisolvent, but also enhances its molecular alignment, resulting in improved conductivity as an electron transport layer. High-temperature annealed PCBM (HT-PCBM) effectively minimizes trap-assisted nonradiative recombination by reducing trap density in perovskite and improving the electrical properties at the interface between SnO 2 and perovskite layers. This HT-PCBM process significantly enhances the performance of the PeSCs, including the open-circuit voltage (V OC ) from 0.39 to 0.77 V, fill factor from 52% to 65%, and power conversion efficiency (PCE) from 6.03% to 15.50%, representing substantial improvements compared to devices without PCBM. This PCE is the highest efficiency among conventional (n-i-p) Sn−Pb PeSCs reported to date. Moreover, passivating the trap sites of SnO 2 and separating the interface between the Sn-containing perovskite and the substrate effectively have improved the stability of the Sn−Pb perovskite in the n-i-p structure. The optimized best device with HT-PCBM has maintained an efficiency of over 90% for more than 300 h at 85 °C and 5000 h at room temperature in a glovebox atmosphere.

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Interface modification of CH 3 NH 3 PbI 3 /PCBM by pre-heat treatment for efficiency enhancement of perovskite solar cells

Cited by 17 publications

References 26 publications

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability

Enhancing Performance and Stability of Sn–Pb Perovskite Solar Cells with Oriented Phenyl-C₆₁-Butyric Acid Methyl Ester Layer via High-Temperature Annealing

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Interface modification of CH 3 NH 3 PbI 3 /PCBM by pre-heat treatment for efficiency enhancement of perovskite solar cells

Cited by 17 publications

References 26 publications

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

Investigation of the Performance of Perovskite Solar Cells with ZnO-Covered PC61BM Electron Transport Layer

Solution processed PCBM-CH3NH3PbI3 heterojunction photodetectors with enhanced performance and stability

Enhancing Performance and Stability of Sn–Pb Perovskite Solar Cells with Oriented Phenyl-C61-Butyric Acid Methyl Ester Layer via High-Temperature Annealing

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Product

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Enhancing Performance and Stability of Sn–Pb Perovskite Solar Cells with Oriented Phenyl-C₆₁-Butyric Acid Methyl Ester Layer via High-Temperature Annealing