A Mechanically Robust Conducting Polymer Network Electrode for Efficient Flexible Perovskite Solar Cells

Hu, Xiaotian; Meng, Xiangchuan; Zhang, Lin; Zhang, Yanyan; Cai, Zheren; Huang, Zengqi; Su, Meng; Wang, Yang; Li, Mingzhu; Li, Fengyu; Yao, Xi; Wang, Fuyi; Ma, Wei; Chen, Yiwang; Song, Yanlin

doi:10.1016/j.joule.2019.06.011

Cited by 198 publications

(184 citation statements)

References 46 publications

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“…[6,7] Bendable and stretchable PSC devices are more practically suited to commercial applications compared to rigid silicon-based solar cells in grid-connected photovoltaics. [8][9][10][11][12][13] However, printable PSCs based on flexible substrates should reproduce the high performance obtained with rigid devices,w hile simultaneously maintaining excellent mechanical bendable and stretchable stabilities. [14][15][16][17][18][19] Challengingly,perovskite films on flexible substrate are naturally brittle and possess poor crystallinity and numerous grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Stretchable Perovskite Solar Cells with Recoverable Performance

et al. 2020

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Perovskite solar cells (PSCs) are a promising photovoltaic technology for stretchable applications because of their flexible, light‐weight, and low‐cost characteristics. However, the fragility of crystals and poor crystallinity of perovskite on stretchable substrates results in performance loss. In fact, grain boundary defects are the “Achilles’ heel” of optoelectronic and mechanical stability. We incorporate a self‐healing polyurethane (s‐PU) with dynamic oxime–carbamate bonds as a scaffold into the perovskite films, which simultaneously enhances crystallinity and passivates the grain boundary of the perovskite films. The stretchable PSCs with s‐PU deliver a stabilized efficiency of 19.15 % with negligible hysteresis, which is comparable to the performance on rigid substrates. The PSCs can maintain over 90 % of their initial efficiency after 3000 hours in air because of their self‐encapsulating structure. Importantly, the self‐healing function of the s‐PU scaffold was verified in situ. The s‐PU can release mechanical stress and repair cracks at the grain boundary on multiple levels. The devices recover 88 % of their original efficiency after 1000 cycles at 20 % stretch. We believe that this ingenious growth strategy for crystalline semiconductors will facilitate development of flexible and stretchable electronics.

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Section: Introductionmentioning

confidence: 99%

Stretchable Perovskite Solar Cells with Recoverable Performance

et al. 2020

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“…Corresponding flexible devices showed a remarkable efficiency up to 19% upon an area of 0.1 cm 2 . These devices also exhibited strong mechanical stability, retaining 85% of their original efficiency after 5000‐time bending cycles at a curvature radius of 3 mm . In addition, PEDOT:PSS can simultaneously function as the electrode and HTL in the inverted FPSC structure (Figure f) …”

Section: Transparent Bottom Electrodesmentioning

confidence: 96%

“…d) Chemical structures of conductivity and flexibility enhancer (CFE) and PEDOT:PSS and e) diffusive transmittance spectra of corresponding flexible electrodes. Reproduced with permission . Copyright 2019, Cell Press.…”

Section: Transparent Bottom Electrodesmentioning

confidence: 99%

Recent Advances of Device Components toward Efficient Flexible Perovskite Solar Cells

2020

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Flexible solar cells have launched potential applications in diverse areas, such as civil engineering, consumer electronics, electric automobile, and aerospace use. In recent years, perovskite solar cells (PSCs) have been successful with a rocketing power conversion efficiency (PCE) from 3.8% to 25.2% in the last decade. Due to its material flexibility, together with low‐cost and facile fabrication processes, perovskites have certainly been considered as a promising candidate for the next generation of flexible solar cells. So far, the PCE of single‐junction flexible perovskite solar cells (FPSCs) has reached 19.51%, which retains researchers' great enthusiasm for further development and applications of FPSCs. Herein, a brief review of the recent advances in the structural components of FPSCs is presented, including perovskite absorber layers, flexible substrates, transparent bottom electrodes, and charge carrier transport layers. In particular, the focus is on the development of low‐temperature fabrication processes of the aforementioned compositional layer structures. Finally, noticeable achievements and annual milestones are discussed and summarized, and suggestions for further improvement of FPSCs and their ways toward commercialization are presented.

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“…[ 46–48 ] Among them, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as transparent conducting polymers showed the most promising potential for cost‐effective flexible devices owing to its exceptional intrinsic flexibility, high transparency, easy film‐processability, and superior thermal stability. [ 5,49–52 ] Despite that, PEDOT:PSS still has drawbacks associated with its conductivity and mechanical flexibility, [ 5 ] which may substantially restrain its applications in FST‐OSCs.…”

Section: Figurementioning

confidence: 99%

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

Song

Fanady

Peng

et al. 2020

Advanced Energy Materials

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solution-processability, and lightweight property. [1][2][3][4][5][6] Recently, the power conversion efficiency (PCE) of a single-junction device based on binary photoactive layer system had surpassed the 15-16% boundaries for opaque OSCs and 11-12% boundaries for semitransparent OSCs (ST-OSCs), all of which were fabricated on rigid glass substrates. [7][8][9][10][11][12][13][14] Though the PCE had increased remarkably on rigid glass substrates, development of OSCs on flexible substrates particularly for flexible ST-OSCs still lagged behind. [15][16][17][18] To date, the highest reported PCE for flexible ST-OSCs with average visible light transmittance (AVT) of over 20% was just over 10%. [19] Greater attentions should be focused on the development of flexible ST-OSCs due to its promising potentials as power-generating windows/roofs in building-integrated photovoltaics and photovoltaic vehicles. Additionally, one needs to consider the foldability properties of flexible ST-OSCs if advanced applications in 3D curved surfaces (e.g., future foldable roofs in multifunctional selfpowered greenhouse) are to be realized. This situation drove the current works for foldable-flexible ST-OSCs (hereafter referred to as FST-OSCs).Over the years, studies on ST-OSCs and/or FST-OSCs have centered around materials design of the photoactive layer (design of novel donor/acceptor). [6,20,21] Generally, photo active layer is designed to readily absorb solar irradiation in the nearinfrared (NIR) to infrared (IR) region while being partially transparent in the visible light region. These IR-absorbing photoactive layers are particularly favorable for agricultural applications (e.g., common greenhouse) as sunlight in the visible light region can be predominantly transmitted for plants growth. In fact, solar irradiation located in the visible light region (370-740 nm) is mostly responsible for photosynthesis processes in plants for growth. [22] Through this, ST-OSCs and/ or FST-OSCs for photovoltaic and photosynthesis can be realized, proving the future potential of semitransparent devices as windows/roofs in multifunctional self-powered greenhouse.FST-OSCs have several key parameters similar to its rigid counterparts, such as efficiency, transparency, color, and color rendering property. The main distinct feature of FST-OSCs is its mechanical stability against extreme mechanical Semitransparent organic solar cells (ST-OSCs) have attracted extensive attention for their potential greenhouse applications. Conventional ST-OSCs are typically based on indium tin oxide (ITO) electrodes which suffer from mechanical brittleness. Therefore, alternatives for ITO are required for realization of foldable-flexible ST-OSCs (FST-OSCs). Herein, flexible poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) electrodes are prepared as ITO alternatives via polyhydroxy compound (xylitol) microdoping and acid treatment. As a result, flexible opaque OSCs based on PBDB-T-2F:Y6 photoactive system yield a high efficiency of 14.20%. The desirable optic...

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A Mechanically Robust Conducting Polymer Network Electrode for Efficient Flexible Perovskite Solar Cells

Cited by 198 publications

References 46 publications

Stretchable Perovskite Solar Cells with Recoverable Performance

Stretchable Perovskite Solar Cells with Recoverable Performance

Recent Advances of Device Components toward Efficient Flexible Perovskite Solar Cells

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

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