Carbon nanofibers fabricated via electrospinning to guide crystalline orientation for stable perovskite solar cells with efficiency over 24%

Xu, Zhiyang; Gong, Yongshuai; Wang, Jihao; Ma, Zongwen; Yu, Runnan; Yang, Jing; Liu, Yong; Guo, Qiang; Tan, Zhanao

doi:10.1016/j.cej.2022.139961

Cited by 12 publications

(8 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure S8 displays the SEM images and corresponding size distribution of all perovskite films with different concentrations of TiO 2 /C NFs. This increase in grain size suggested that TiO 2 /C NFs provided nucleation sites for the perovskite grains growth. , …”

Section: Resultsmentioning

confidence: 94%

“…This increase in grain size suggested that TiO 2 /C NFs provided nucleation sites for the perovskite grains growth. 26,27 To see more clearly the status of the TiO 2 /C NFs, excessive TiO 2 /C NFs (0.2 mg/mL) were added to the perovskite precursor solution. The EDX elemental mapping of the perovskite film with excessive TiO 2 /C NFs was performed, as shown in Figure S9, indicating that the TiO 2 /C NFs were distributed in the surface and inside of perovskite.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

ETL-Free Perovskite Solar Cells with an Efficiency of 19.81% in Open Air

Gu,

Song,

Zhang

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Electron transport layer (ETL)-free perovskite solar cells (PSCs) have garnered significant attention due to their simple manufacturing process. However, containing ETL results in blocking holes and suppressing charge recombination. Herein, the titanium dioxide (TiO 2 )-doped carbon nanofibers (TiO 2 /C NFs) via electrospinning were introduced into the perovskite absorber layer. The one-dimensional TiO 2 /C NFs provided an additional charge transport channel to promote the carrier transfer and suppress nonradiative recombination. Carbon nanofibers with high conductivity could also improve the electrical conductivity of perovskite. Moreover, TiO 2 /C NFs functioned as the nucleation sites to regulate the preferred orientation of perovskite crystals. Finally, the power conversion efficiency (PCE) of rigid PSCs with TiO 2 /C NFs was significantly improved from 18.07 to 19.81%, with an enhanced stability of only 11% degradation after exposure to an ambient environment for 300 h. In addition, the TiO 2 /C NFs-optimized flexible devices exhibited a PCE of 17.61%. Highly flexible TiO 2 /C NFs incorporating effectively improved the bending stability, wherein the flexible PSCs without and with TiO 2 /C NFs retained 84.27 and 48.33% of the original PCE after 6000 bending cycles (radius: 3 mm), respectively. This work highlights a significant application of TiO 2 /C NFs in developing highefficiency and well-stability minimalist PSCs.

show abstract

Section: Resultsmentioning

confidence: 94%

Section: ■ Results and Discussionmentioning

confidence: 99%

ETL-Free Perovskite Solar Cells with an Efficiency of 19.81% in Open Air

Gu,

Song,

Zhang

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…The presence of TBAPF 6 in the perovskite films was observed from N 1s and F 1s spectra (Figure S6a,b). According to the C 1s spectrum (Figure a), the characteristic peaks corresponding to C–C and C–N bonds of MA + /FA + in perovskite films are located at 284.08 and 285.48 eV, respectively. , In the control perovskite film, an additional characteristic peak corresponding to the CO bond appears at 287.54 eV . This peak could be assigned to the breakdown of perovskite because of the interaction with air during measurement and storage .…”

Section: Resultsmentioning

confidence: 99%

Ion-Organic Compound Interface Strategy Enables High-Efficiency Perovskite Solar Cells

Cao,

Wu,

Wang

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The interface strategy plays an irreplaceable role in improving the photovoltaic performance of perovskite solar cells (PSCs). To alleviate this issue, we apply tetrabutylammonium hexafluorophosphate (TBAPF 6 ), an ion-organic compound, to modify the perovskite/Spiro-OMeTAD interface of the n−i−p structure. TBAPF 6 effectively improves carrier transport at interfaces by simultaneously interacting with Pb 2+ and I − vacancy electrostatics, and PF 6− and TBA + have electrostatic interactions with the I − and Pb 2+ vacancies, respectively. Moreover, TBAPF 6 can strongly penetrate the SnO 2 surface, forming P−O−Sn to reduce the −OH suspension bond on the SnO 2 surface. Due to the formation of N−H−F hydrogen bonds, the transition of α-FAPbI 3 to δ-FAPbI 3 can be inhibited. The multiple fluorine atoms and butyl chains of TBAPF 6 efficiently result in improved hydrophobicity of the perovskite film. With the addition of TBAPF 6 , energy-level matching and mechanical adhesion at the perovskite and Spiro-OMeTAD interfaces can be enhanced simultaneously. As a result, we achieved a target champion power conversion efficiency (PCE) of 23.88%, with an excellent short-circuit current density (J SC ) of 25.90 mA cm −2 , versus 20.94% in the control device. The unencapsulated device with TBAPF 6 treatment exhibits a high PCE retention of 84.5% when stored under a controlled environment (relative humidity of 30% and room temperature) for 1000 h. Our results demonstrate that TBAPF 6 is an efficient dual-function modifier for constructing high-performing PSCs.

show abstract

“…Carbon materials exhibit various structures, [17] demonstrating plentiful resources, low cost, high conductivity, and other notable characteristics such as guiding the preferential orientation of perovskite crystals. [18,19] More importantly, carbon materials have the following advantages when used as conductive electrodes.…”

Section: Introductionmentioning

confidence: 99%

Application of Carbon Materials in Conductive Electrodes for Perovskite Solar Cells

Meng,

Wang,

Chang

et al. 2024

Solar RRL

View full text Add to dashboard Cite

Over the past decade, perovskite solar cells (PSCs) have achieved significant achievements. But the golden triangle problem of commercial development, which encompasses high efficiency, high stability, and low cost, remains unresolved. Carbon materials exhibit a diverse range of morphological structures and possess numerous advantages. They are extensively used in PSCs to overcome the challenges encountered during PSCs commercialization. The PSCs utilizing graphene as the top electrodes not only deliver an impressive efficiency of 22.8%, but also show exceptional long‐term stability. The PSCs using carbon nanotubes as transparent conductive electrodes obtain an efficiency of 19%, exhibiting significant potential for scalable applications. Herein, the advantages of carbon materials as conductive electrodes are overviewed. The compatibility of carbon materials as conductive electrodes in PSCs, along with the associated challenges, regulatory strategies, and device performance are systematically discussed in terms of their intrinsic characteristics. The application of carbon materials derived from petroleum by‐products and biomass in the top electrodes of PSCs are summarized in detail. Finally, the underlying reasons why PSCs using carbon electrode show a comparatively lower efficiency when compared to conventional devices is analyzed in‐depth. The potential research directions are proposed to promote the development of carbon conductive electrodes in PSCs.This article is protected by copyright. All rights reserved.

show abstract

Carbon nanofibers fabricated via electrospinning to guide crystalline orientation for stable perovskite solar cells with efficiency over 24%

Cited by 12 publications

References 57 publications

ETL-Free Perovskite Solar Cells with an Efficiency of 19.81% in Open Air

ETL-Free Perovskite Solar Cells with an Efficiency of 19.81% in Open Air

Ion-Organic Compound Interface Strategy Enables High-Efficiency Perovskite Solar Cells

Application of Carbon Materials in Conductive Electrodes for Perovskite Solar Cells

Contact Info

Product

Resources

About