On the role of solution-processed bathocuproine in high-efficiency inverted perovskite solar cells

Chiang, Shou-En; Chandel, Anjali; Thakur, Diksha; Chen, Yan-Ta; Lin, Pei-Chen; Wu, Jia‐Ren; Cai, Kun‐Bin; Kassou, Said; Yeh, Jui‐Ming; Yuan, Chi‐Tsu; Shen, Ji‐Lin; Chang, Shih-Yu

doi:10.1016/j.solener.2021.02.047

Cited by 24 publications

(13 citation statements)

References 51 publications

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“…Besides, a BCP/IPA solution was used to modify the PCBM thin film and the contact quality at the PCBM/MAPbI 3 interface. 29 Finally, high-efficiency inverted MAPbI 3 solar cells were prepared using the spin-coating technique and thermal evaporation method. The active area of a single MAPbI 3 solar device is defined to be 2 × 5 mm 2 using a shadow mask during the thermal evaporation process of Ag thin films.…”

Section: Methodsmentioning

confidence: 99%

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Thakur

Chiang

et al. 2022

Nanoscale

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Section: Methodsmentioning

confidence: 99%

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Thakur

Chiang

et al. 2022

Nanoscale

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“…[ 51,52 ] The inverted structure makes extensive use of BCP, which is inserted between the electron transport layer (ETL) and the metal electrode for better interface formation and energy‐level tuning, increasing the FF and consequently the overall performance of the device. [ 53–55 ] However, the high hydrophilicity of BCP is a disadvantage because it allows the insertion of water into the device. Inspired by the higher hydrophobicity of AzPy compared to that of BCP, we inserted this molecule at the top of the device, specifically below the cathode, to protect the device from the ambient conditions and improve its lifetime.…”

Section: Resultsmentioning

confidence: 99%

Performance and Stability Improvement of Inverted Perovskite Solar Cells by Interface Modification of Charge Transport Layers Using an Azulene–Pyridine Molecule

et al. 2022

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Herein, an azulene–pyridine molecule (AzPy) is implemented in inverted perovskite solar cells (PSCs) for increasing the power conversion efficiency (PCE) and the stability of the devices. The first goal is achieved by depositing a thin layer of AzPy on top of the hole charge transport layer (HTL). The surface engineering of HTL with AzPy improves the perovskite layer formation, thus increasing light absorption and reducing bulk nonradiative recombination while protecting the perovskite from degradation species from the HTL. This approach increases the mean PCE by approximately 6%. The second goal of improving the stability of the devices is mainly achieved by replacing the hydrophilic bathocuproine (BCP) with the more hydrophobic AzPy. By the development of an AzPy layer over the electron transport layer (ETL), the stability of the PSCs is increased under ambient conditions and thermal or light stress, without affecting the PCE. The two proposed interface engineering approaches are both implemented in the device in conjunction with the perovskite surface treatment with n‐hexylammonium bromide, resulting in devices that deliver a PCE of 20.42% and increased thermal and light stability, thus retaining 90% of their initial PCE for more than 1200 h under ambient conditions.

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“…The BCP/IPA solutions were spin coated on top of the PCBM/ MA x Cs 1− x Pb(I x Br 1− x ) 3 /P3CT‐Na/ITO/glass samples to modify the PCBM thin film and the PCBM/perovskite interface. [ 64 ] Finally, the 100 nm‐thick Ag films are thermally evaporated on top of the samples under low vacuum conditions (<2 × 10 −6 torr), to act as a cathode electrode. The active area of the solar cells is defined to be 0.2 × 0.5 cm 2 with the use of a stainless‐steel shadow mask during the thermal evaporation process.…”

Section: Methodsmentioning

confidence: 99%

Stable and Efficient Graded MA_0.83Cs_0.17Pb(I_0.83Br_0.17)₃ Alloy Thin Film‐Based Inverted‐Type Perovskite Solar Cells

et al. 2021

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The surface morphologies, crystallinities, and excitonic characteristics of MAxCs1−xPb(IxBr1−x)3 thin films deposited on top of the P3CT‐Na/ITO/glass substrates are investigated by using the atomic‐force microscopic images, absorbance spectra, grazing incidence X‐ray diffraction patterns, photoluminescence (PL) spectra, and Raman scattering spectra. The P3CT‐Na‐based perovskite solar cell shows a stable and efficient maximum power density curve due to the formation of a graded MA0.83Cs0.17Pb(I0.83Br0.17)3 alloy thin film which is confirmed by using the surface‐sensitive PL and Raman scattering spectra. The highest power conversion efficiency (PCE) of the P3CT‐Na‐based MA0.83Cs0.17Pb(I0.83Br0.17)3 solar cells is 15.93% mainly due to the high fill factor of 79.4%. Besides, the PCE of the nonencapsulated solar cell slowly decreases to a moderate value (10.48%) within 157 days under an uncontrolled environment (55–60 relative humidity%) at room temperatures (22–25 °C).

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On the role of solution-processed bathocuproine in high-efficiency inverted perovskite solar cells

Cited by 24 publications

References 51 publications

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Performance and Stability Improvement of Inverted Perovskite Solar Cells by Interface Modification of Charge Transport Layers Using an Azulene–Pyridine Molecule

Stable and Efficient Graded MA_0.83Cs_0.17Pb(I_0.83Br_0.17)₃ Alloy Thin Film‐Based Inverted‐Type Perovskite Solar Cells

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On the role of solution-processed bathocuproine in high-efficiency inverted perovskite solar cells

Cited by 24 publications

References 51 publications

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

Performance and Stability Improvement of Inverted Perovskite Solar Cells by Interface Modification of Charge Transport Layers Using an Azulene–Pyridine Molecule

Stable and Efficient Graded MA0.83Cs0.17Pb(I0.83Br0.17)3 Alloy Thin Film‐Based Inverted‐Type Perovskite Solar Cells

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Stable and Efficient Graded MA_0.83Cs_0.17Pb(I_0.83Br_0.17)₃ Alloy Thin Film‐Based Inverted‐Type Perovskite Solar Cells