Self-healing and efficient flexible perovskite solar cells enabled by host–guest interaction and a 2D/3D heterostructure

Yang, Zhengchi; Jiang, Yue; Xu, Dongdong; Wang, Zhen; Gao, Xingsen; Lu, Xubing; Zhou, Guofu; Liu, Jun‐Ming; Gao, Jinwei

doi:10.1039/d2ta05968a

Cited by 15 publications

(16 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 1d, region 1 was assigned as the perovskite grains with the interplanar spacing of 3.2 Å, well consistent with the representative α‐phase (200) perovskite. [ 28 ] Meanwhile, the amorphous region 2 was observed along the grain boundaries of perovskite crystals, confirming that DSSP‐PPU has wrapped the perovskite crystals.…”

Section: Resultsmentioning

confidence: 81%

“…Aiming to solve this problem, researchers have further introduced self‐healing strategy via dynamic covalent exchange in the polymer, not only to release mechanical stress but also to repair GBs cracks. For instance, the dynamic oxime‐carbamate bond, [ 25 ] hydrogen bond, [ 26 ] dynamic disulfide bond, [ 13,27 ] and host–guest interaction of cyclodextrin and adamantane [ 28 ] were shown to be effective in repairing perovskite cracks under certain external stimulation, such as thermal and humidity activators. However, additional heating (60−100 °C) or certain humidity activation may cause additional perovskite lattice strain or morphology change, negatively affecting the stability of the F‐PSCs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Yang,

Jiang,

Wang

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

Flexible perovskite solar cells (F‐PSCs) have emerged as promising alternatives to conventional silicon solar cells for applications in portable and wearable electronics. However, the mechanical stability of inherently brittle perovskite, due to residual lattice stress and ductile fracture formation, poses significant challenges to the long‐term photovoltaic performance and device lifetime. In this paper, to address this issue, a dynamic “ligament” composed of supramolecular poly(dimethylsiloxane) polyurethane (DSSP‐PPU) is introduced into the grain boundaries of the PSCs, facilitating the release of residual stress and softening of the grain boundaries. Remarkably, this dynamic “ligament” exhibits excellent self‐healing properties and enables the healing of cracks in perovskite films at room temperature. The obtained PSCs have achieved power conversion efficiencies of 23.73% and 22.24% for rigid substrates and flexible substrates, respectively, also 17.32% for flexible mini‐modules. Notably, the F‐PSCs retain nearly 80% of their initial efficiency even after subjecting the F‐PSCs to 8000 bending cycles (r = 2 mm), which can further recover to almost 90% of the initial efficiency through the self‐healing process. This remarkable improvement in device stability and longevity holds great promise for extending the overall lifetime of F‐PSCs.

show abstract

Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Yang,

Jiang,

Wang

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…As demonstrated in Figure S11, Supporting Information, less change can be distinguished in the bandgap ( E g ). However, the CBM of the PDA: SnO 2 aligns better with the CBM of perovskite than SnO 2 , which could lower the charge transfer barrier and facilitate electron extraction efficiency [ 51 ] (Figure S12, Supporting Information). The calculation results are listed in Table S3, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Wang,

Jiang,

et al. 2023

Solar RRL

Self Cite

View full text Add to dashboard Cite

SnO2 has been a widely used electron transport layer, due to its high electron mobility and stable chemical properties in n–i–p type perovskite solar cells (PSCs). However, the interfacial mismatch, especially on the residual strain and the different mechanical properties between SnO2 and perovskite films, leads to an obvious decrease in power conversion efficiency (PCE) and flexibility in the SnO2‐based PSCs. This limitation has severely hindered the large‐scale implementation of flexible PSCs. Herein, polydopamine is introduced in SnO2 as “depletion intermediary”, which significantly improves the interfacial contact and mitigates the inherent brittleness of SnO2 film. The obtained PSCs have achieved a PCE of 22.70% and 21.04% based on the rigid and flexible devices, respectively. Most importantly, the flexibility has been largely improved, that after 3000 bending cycles with a 5 mm bending radius, approximately 87% of its original efficiency has been retained.

show abstract

“…Yang et al used the 𝛽-cyclodextrin (𝛽-CD), adamantane (AA), and methacrylguanidine hydrochloride (MAGH) to synthesize terpolymer (TPP) during the perovskite fabrication process. [142] The MAGH served as the space molecular, enabling the formation of a 2D/3D heterostructure perovskite as a moisture shielding and passivation layer. In the TPP-perovskite composite, host-guest interaction and hydrogen bonds were utilized to improve the self-healing properties.…”

Section: Healing Strain-induced Degradation By Self-healing Polymermentioning

confidence: 99%

Self‐Healing Behavior of the Metal Halide Perovskites and Photovoltaics

Wang,

Qu,

Zhou

et al. 2023

Small

View full text Add to dashboard Cite

Perovskite solar cells have achieved rapid progress in the new‐generation photovoltaic field, but the commercialization lags behind owing to the device stability issue under operational conditions. Ultimately, the instability issue is attributed to the soft lattice of ionic perovskite crystal. In brief, metal halide perovskite materials are susceptible to structural instability processes, including phase segregation, component loss, lattice distortion, and fatigue failure under harsh external stimuli such as high humidity, strong irradiation, wide thermal cycles, and large stress. Developing self‐healing perovskites to further improve the unsatisfactory operational stability of their photoelectric devices under harsh stimuli has become a cutting‐edge hotspot in this field. This self‐healing behavior needs to be studied more comprehensively. Therefore, the self‐healing behavior of the metal halide perovskites and photovoltaics is classified and summarized in this review. By discussing recent advances, underlying mechanisms, strategies, and existing challenges, this review provides perspectives on self‐healing of perovskite solar cells in the future.

show abstract

Self-healing and efficient flexible perovskite solar cells enabled by host–guest interaction and a 2D/3D heterostructure

Abstract: Flexible perovskite solar cells (F-PSCs) have attracted enormous attentions in portable and wearable electronics due to low-cost and high power-per-weight. However, there is still much room towards the advancement in...

Cited by 15 publications

References 39 publications

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Self‐Healing Behavior of the Metal Halide Perovskites and Photovoltaics

Contact Info

Product

Resources

About

Self-healing and efficient flexible perovskite solar cells enabled by host–guest interaction and a 2D/3D heterostructure

Abstract: Flexible perovskite solar cells (F-PSCs) have attracted enormous attentions in portable and wearable electronics due to low-cost and high power-per-weight. However, there is still much room towards the advancement in...

Cited by 15 publications

References 39 publications

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Supramolecular Polyurethane “Ligaments” Enabling Room‐Temperature Self‐Healing Flexible Perovskite Solar Cells and Mini‐Modules

Ameliorating the Interfacial Mismatch of SnO2 and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells

Self‐Healing Behavior of the Metal Halide Perovskites and Photovoltaics

Contact Info

Product

Resources

About

Ameliorating the Interfacial Mismatch of SnO₂ and Perovskite Enabling High Mechanical Stability for Flexible Perovskite Solar Cells