Interfacial engineering and optical coupling for multicolored semitransparent inverted organic photovoltaics with a record efficiency of over 12%

Bai, Yiming; Zhao, Chunyan; Chen, Xiaohan; Zhang, Shuai; Zhang, Shaoqing; Hayat, Tasawar; Alsaedi, Ahmed; Tan, Zhan’ao; Hou, Jianhui; Li, Yongfang

doi:10.1039/c9ta05789g

Cited by 89 publications

(69 citation statements)

References 46 publications

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“…Organic solar cells have a number of advantages compared to many of their inorganic counterparts, such as being lightweight, mechanically flexible and aesthetically appealing (e.g., because of their semitransparency), promising their application in multiple areas where conventional photovoltaics cannot be employed, for instance, as PV modules for smart windows, energy‐generating wallpapers and beyond . Encouragingly, the light power conversion efficiency (PCE) of organic solar cells is rapidly increasing, and the best laboratory devices have recently surpassed the 17% threshold .…”

Section: Introductionmentioning

confidence: 99%

What is Killing Organic Photovoltaics: Light‐Induced Crosslinking as a General Degradation Pathway of Organic Conjugated Molecules

Yamilova

Martynov

Brandvold

et al. 2020

Advanced Energy Materials

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In view of a rapid development and increase in efficiency of organic solar cells, reaching their long‐term operational stability represents now one of the main challenges to be addressed on the way toward commercialization of this photovoltaic technology. However, intrinsic degradation pathways occurring in organic solar cells under realistic operational conditions remain poorly understood. The light‐induced dimerization of the fullerene‐based acceptor materials discovered recently is considered to be one of the main causes for burn‐in degradation of organic solar cells. In this work, it is shown that not only the fullerene derivatives but also different types of conjugated polymers and small molecules undergo similar light‐induced crosslinking regardless of their chemical composition and structure. In the case of conjugated polymers, crosslinking of macromolecules leads to a rapid increase in their molecular weight and consequent loss of solubility, which can be revealed in a straightforward way by gel permeation chromatography analysis via a reduction/loss of signal and/or smaller retention times. Results of this work, thus, shift the paradigm of research in the field toward designing a new generation of organic absorbers with enhanced intrinsic photochemical stability in order to reach practically useful operation lifetimes required for successful commercialization of organic photovoltaics.

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Section: Introductionmentioning

confidence: 99%

What is Killing Organic Photovoltaics: Light‐Induced Crosslinking as a General Degradation Pathway of Organic Conjugated Molecules

Yamilova

Martynov

Brandvold

et al. 2020

Advanced Energy Materials

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“…[ 1–6 ] 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. [ 7–14 ] Though the PCE had increased remarkably on rigid glass substrates, development of OSCs on flexible substrates particularly for flexible ST‐OSCs still lagged behind. [ 15–18 ] To date, the highest reported PCE for flexible ST‐OSCs with average visible light transmittance (AVT) of over 20% was just over 10%.…”

Section: Figurementioning

confidence: 99%

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

Song

Fanady

Peng

et al. 2020

Advanced Energy Materials

128

102

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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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“…To realize semitransparency in OPVs and PSCs, one can manipulate the coverage, [ 35–43,161–163 ] thickness, [ 10–17,44–48,164,165 ] or bandgap of the active layer [ 2,8,9,18–24,49,50,166–168 ] or replace the opaque metal electrode with light‐transmitting media (e.g., metal nanowires, [ 44,46,51–56,169–171 ] transparent conducting oxides, [ 43,57–61,167,168,172–180 ] transparent conducting polymers, [ 40,62,63,181–184 ] graphene, [ 54,64,164,185 ] and carbon nanotube [ 65,186–188 ] ). Although the most convenient way to fabricate an ST‐PV is to decrease the thickness of the top metal electrode and, thereby, increase its transparency, [ 35,39,40,47,58,66–72,124 ] there is always a trade‐off between conductivity and transparency.…”

Section: Semitransparent Opvs and Pscsmentioning

confidence: 99%

“…[ 10–17 ] The integration of new structures with low‐bandgap active layer materials has provided high‐performance visibly transparent OPVs. [ 18–24 ] For instance, Yang et al demonstrated an ST‐OPV having a PCE of 12% and an average visible transmittance (AVT) of 20% using a thin Au/Ag electrode and a strategy of transparent hole‐transporting frameworks. [ 25 ] Several light‐trapping methods, including the incorporation of antireflection layers, [ 26,27 ] microcavity (MC) structures, [ 28 ] distributed Bragg reflectors (DBRs) and photonic crystals (PCs), [ 29,30 ] and nanostructures, [ 31,32 ] have further optimized the light harvesting and optical responses of such devices.…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress on Advanced Optical Structures for Emerging Photovoltaics and Photodetectors

Chen

Tan

Hsu

et al. 2020

Adv Energy and Sustain Res

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Organic‐ and perovskite‐based optoelectronics, which merge excellent optoelectronic properties with potentially large and high‐throughput manufacturing, have attracted attention as emerging revolutionary technologies with considerable practical applications. Herein, the recent progresses in organic‐ and perovskite‐based photovoltaics and photodetectors with integration of judicious optical structure designs are summarized. The characterization and performance metrics of such devices from the perspectives of device architecture, physics, and material science are studied. Research related to devices having dielectric mirrors, diffracted Bragg reflectors/photonic crystals, microcavities, and 2D photonic structures as design elements is discussed. Some suggestions of promising directions for future studies are concluded.

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Interfacial engineering and optical coupling for multicolored semitransparent inverted organic photovoltaics with a record efficiency of over 12%

Abstract: Guided by finite-difference time-domain (FDTD) and optical transfer matrix formalism (TMF) simulation, the contradiction between PCE and AVT was solved, and multicolored ST-OSCs with record high efficiency were achieved.

Cited by 89 publications

References 46 publications

What is Killing Organic Photovoltaics: Light‐Induced Crosslinking as a General Degradation Pathway of Organic Conjugated Molecules

What is Killing Organic Photovoltaics: Light‐Induced Crosslinking as a General Degradation Pathway of Organic Conjugated Molecules

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

Recent Progress on Advanced Optical Structures for Emerging Photovoltaics and Photodetectors

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