Ultra-thick semi-crystalline photoactive donor polymer for efficient indoor organic photovoltaics

Shin, Sang Chul; Koh, Chang Woo; Vincent, Premkumar; Goo, Ji Soo; Bae, Jin Hyuk; Lee, Jae Joon; Shin, Changhwan; Kim, Hyeok; Woo, Han Young; Shim, Jae Won

doi:10.1016/j.nanoen.2019.01.061

Cited by 81 publications

(89 citation statements)

References 32 publications

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“…This p-type semiconductor also shows interesting properties as a red lightselective organic photodetector [24,25] and as an indoor light harvester. [26][27][28][29] The synthesis of both starting monomers requires a small number of synthetic steps, all using low-cost starting materials. M1 only requires 1 alkylation step from commercial compounds, where M2 requires 3 synthetic steps (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Water Compatible Direct (Hetero)arylation Polymerization of PPDT2FBT: A Pathway Towards Large‐Scale Production of Organic Solar Cells

et al. 2020

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The interest in organic solar cells (OSCs) has grown exponentially over the last few years and devices are approaching a symbolic power conversion efficiency (PCE) of 20%. However, many challenges related to scaling‐up several processes must be addressed before this technology can reach the production scale. In order to facilitate the scaled‐up production of OSCs, the synthesis of an efficient and cost‐effective conjugated polymer, PPDT2FBT, was adapted to a water‐based method of direct (hetero)arylation polymerization (DHAP). This aqueous DHAP method yields molecular weights (Mn) between 20 and 80 kg mol−1, which can be controlled by manipulating the polymerization time and temperature. The varying polymer molecular weights were used for the fabrication of OSCs with PC61BM and air‐processed in non‐halogenated solvents. When the 40 kg mol−1 PPDT2FBT:PC61BM active layer is slot‐die coated, PCEs of 8.15% were attained under standard one sun illumination. The temporal stability of the devices under constant illumination showed a 80% PCE loss after 220 hours (TS80), after the initial ‘‘burn‐in’’.

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Section: Introductionmentioning

confidence: 99%

Water Compatible Direct (Hetero)arylation Polymerization of PPDT2FBT: A Pathway Towards Large‐Scale Production of Organic Solar Cells

et al. 2020

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“…[ 8–11 ] This in turn can lead to reduced device and module costs and opens up the technology for use in a wide range of applications including building integrated photovoltaic (PV), vehicle integrated PV, mobile chargers, indoor, and internet of things applications. [ 12–23 ]…”

Section: Introductionmentioning

confidence: 99%

“…OPV appear to be particularly suitable for indoor application as the organic molecules absorption spectrum could be tuned to match the spectrum of indoor light sources—fluorescent lamp, cool white light emitting diode (LED) or warm white LED. [ 16–23 ] There are reports of OPV outperforming the more established silicon (Si) solar cells in indoor light conditions. [ 19–22 ] OPV cells with the more established and commercially available organic semiconductor photoactive materials, such as, P3HT:PCBM and poly[4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐b;4,5‐b′]dithiophene‐2,6‐diyl‐alt‐(4‐(2‐ethylhexyl)‐3‐fluorothieno[3,4‐b]thiophene‐)‐2‐carboxylate‐2‐6‐diyl)] (PCE10 or PTB7‐Th):PCBM blends, used as the photoactive layer (PAL) in the devices, show efficiencies of 13 and 20% respectively under LED light condition.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16–23 ] There are reports of OPV outperforming the more established silicon (Si) solar cells in indoor light conditions. [ 19–22 ] OPV cells with the more established and commercially available organic semiconductor photoactive materials, such as, P3HT:PCBM and poly[4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐b;4,5‐b′]dithiophene‐2,6‐diyl‐alt‐(4‐(2‐ethylhexyl)‐3‐fluorothieno[3,4‐b]thiophene‐)‐2‐carboxylate‐2‐6‐diyl)] (PCE10 or PTB7‐Th):PCBM blends, used as the photoactive layer (PAL) in the devices, show efficiencies of 13 and 20% respectively under LED light condition. [ 21 ] Recently the PCE of 26.1% is achieved for a wide band gap non‐fullerene acceptor for warm‐white LED spectrum with an illuminance of 1000 lux.…”

Section: Introductionmentioning

confidence: 99%

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Organic Photovoltaic Modules Built on Paper Substrates

Jayaraman

Iyer

2020

Adv Materials Technologies

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Organic photovoltaic (OPV) modules, which are attractive for large‐volume high‐throughput production, can become more environmentally sustainable with eco‐friendly flexible substrates such as paper. This article reports fabrication and performance of 108 cm2 active area 12 by 12 cm OPV, built on 15 by 15 cm paper substrates. Active area power conversion efficiency (PCE) values up to 2.38 and 4.23% respectively for poly(3‐hexylthiophene) (P3HT):[6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM) and poly({4,8‐bis[(2‐ethylhexyl)oxy]benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl}{3‐fluoro‐2‐[(2‐ethylhexyl)carbonyl]thieno[3,4‐b]thiophenediyl}) (PTB7):PCBM blend heterojunction photoactive layer modules under AM1.5G spectrum one sun (100 mW cm−2) intensity illumination are demonstrated. Due to better spectrum matching, for 1000 lux cool‐white light emitting diode (LED) illumination, the power density demonstrated is up to 12 µW cm−2 for these modules, which is comparable to 13 µW cm−2 from a (standard illumination PCE 15%) silicon PV device for the same illumination. These results make OPV on environment friendly paper substrate, an attractive option for practical applications.

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“…They also have the advantage of being flexible and solution-processed, as well as having low manufacturing costs and high absorption in the visible light region [4][5][6]. These properties make them attractive options for low-power energy harvesting under indoor light sources [7,8]. Organic solar cells have also been extensively researched and, with a tandem structure, have reached nearly 14% efficiency [9], which is higher than the commercialization efficiency of 10%.…”

Section: Introductionmentioning

confidence: 99%

The Crucial Role of Quaternary Mixtures of Active Layer in Organic Indoor Solar Cells

et al. 2019

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A bulk heterojunction (BHJ) consisting of more than one donor/acceptor is one plausible way to improve the charge transport and/or the spectral absorption range in organic solar cells. Ternary and quaternary solar cells have shown promise in this regard. However, quaternary structures have not yet been intensively tested under indoor lighting conditions. A finite-difference time-domain (FDTD)-based simulation was used to solve for the electric field intensity distribution inside a quaternary photovoltaic device illuminated by 500 lx indoor white light emitting diodes (LEDs). We found that quaternary indoor photovoltaics (IPVs) showed peculiarly high oscillations in the simulated ideal short-circuit current density (Jsc,ideal). Here, we simulated the electric field intensity inside the photovoltaic, compared it to single BHJ photovoltaics, and deduced that the electric field intensity inside the active layer of the IPV was highly sensitive to its thickness due to interference between the incident light and the light reflecting from the back electrode. We also found that Poly[N-9′-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) acted as the primary light absorber in the quaternary blend while poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl}) (PTB7) acted primarily as a cascade energy level and secondarily as a supplementary light absorber.

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Ultra-thick semi-crystalline photoactive donor polymer for efficient indoor organic photovoltaics

Cited by 81 publications

References 32 publications

Water Compatible Direct (Hetero)arylation Polymerization of PPDT2FBT: A Pathway Towards Large‐Scale Production of Organic Solar Cells

Water Compatible Direct (Hetero)arylation Polymerization of PPDT2FBT: A Pathway Towards Large‐Scale Production of Organic Solar Cells

Organic Photovoltaic Modules Built on Paper Substrates

The Crucial Role of Quaternary Mixtures of Active Layer in Organic Indoor Solar Cells

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