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High indoor performance of flexible organic photovoltaics using polymer electrodes
摘要： Indoor organic photovoltaics (OPVs) have gained tremendous attention due to their unique optoelectronic properties under dim and spectrally-limited indoor light conditions. Moreover, their excellent flexible features make them more suitable for powering various indoor electronic devices than other photovoltaic systems. In this article, we demonstrate the indoor photovoltaic performance of poly(3-hexylthiophene):indene-C60 bisadduct-based flexible OPVs with polymeric electrodes in comparison with reference OPVs with indium tin oxide (ITO) electrodes. For the flexible OPVs, poly (3, 4-ethylenedioxythiophene): poly (styrene-sulfonic acid)-based polymeric electrodes were demonstrated on a polyethylene naphthalate substrate with a polyvinyl alcohol buffer layer. The OPV with the polymeric electrode produced an average power conversion efficiency (PCE) of 11.1 ± 0.1%, whereas the reference device with the ITO electrode exhibited a PCE of 8.8 ± 0.1% under a 500-lx-light emitting diode condition. The flexible OPVs also exhibited superior flexibility over reference OPVs by retaining their PCE up to ~ 85% even after 500 bending cycles in air, whereas the reference OPVs declined to ~ 80% of their PCE under the same bending conditions.
关键词： Organic photovoltaics,Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate,Polymeric electrode,Indoor application,Parasitic resistance effects
更新于2025-09-23 15:19:57
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Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications
摘要： As the fastest developing photovoltaic device, perovskite solar cells have achieved an extraordinary power conversion efficiency (PCE) of 25.3% under AM 1.5 illumination. However, few studies have been devoted to perovskite solar cells harvesting artificial light, owing to the great challenge in the simultaneous manipulation of bandgap-adjustable perovskite materials, corresponding matched energy band structure of carrier transport materials, and interfacial defects. Herein, through systematic morphology, composition, and energy band engineering, high-quality Cs0.05MA0.95PbBrxI3?x perovskite as the light absorber and NbyTi1?yO2 (Nb:TiO2) as the electron transport material with an ideal energy band alignment are obtained simultaneously. The theoretical-limit-approaching record PCEs of 36.3% (average: 34.0 ± 1.2%) under light-emitting diode (LED, warm white) and 33.2% under fluorescent lamp (cold white) are achieved simultaneously, as well as a PCE of 19.5% (average: 18.9 ± 0.3%) under solar illumination. An integrated energy conversion and storage system based on an artificial light response solar cell and sodium-ion battery is established for diverse practical applications, including a portable calculator, quartz clock, and even environmental monitoring equipment. Over a week of stable operation shows its great practical potential and provides a new avenue to promote the commercialization of perovskite photovoltaic devices via integration with ingenious electronic devices.
关键词： energy band engineering,weak light harvesting,perovskite solar cells,indoor application
更新于2025-09-19 17:13:59
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Utilization of poly (4-styrenesulfonic acid) doped polyaniline as a hole transport layer of organic solar cell for indoor applications
摘要： The demand for low dimensional, micro powered and wireless indoor electronic devices has been increasing. To power-up those devices, organic photovoltaic (OPV) cells are being employed. The OPV cells exhibit good spectral matching and mechanical ?exibility, and can harvest arti?cial indoor light energy e?ciently. Hole transport layer (HTL) is an important component of an OPV cell. Water stable, low temperature processable poly (3, 4-ethylene dioxythiophene): poly (4-styrenesulfonic acid) (PEDOT:PSS) based HTL is commonly used in the indoor OPV cells. However, strongly acidic, highly hydrophilic and expensive PEDOT:PSS resulted in the development of cheaper, mildly acidic and less humidity sensitive alternative hole transport material (HTM) for the indoor OPV cells. Here, we utilized an economical and low acidic, water-stable PSS doped polyaniline (PANI) as HTM for a poly (3-hexylthiophene): [6, 6]-indene-C60 bisadduct (P3HT:ICBA) active material-based indoor OPV cell. The ?lm formed by chemically synthesized PANI:PSS exhibited over 90% transmittance and approximately 5.15 eV work function value. The OPV device exhibited higher shunt resistance and greater power conversion e?ciency (PCE) during the operation in an indoor environment. For 1000 Lux white LED light, the device showed around 10% PCE. Furthermore, the device exhibited better stability than PEDOT:PSS HTL based indoor OPV.
关键词： Indoor application,Organic solar cell,Hole transport layer,Poly (4-styrenesulfonic acid) doped polyaniline
更新于2025-09-19 17:13:59
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1 cm <sup>2</sup> Organic Photovoltaic Cells for Indoor Application with over 20% Efficiency
摘要： Organic photovoltaic (OPV) technologies have the advantages of fabricating larger-area and light-weight solar panels on flexible substrates by low-cost roll-to-toll production. Recently, OPV cells have achieved many significant advances with power conversion efficiency (PCE) increasing rapidly. However, large-scale solar farms using OPV modules still face great challenges, such as device stability. Herein, the applications of OPV cells in indoor light environments are studied. Via optimizing the active layers to have a good match with the indoor light source, 1 cm2 OPV cells are fabricated and a top PCE of 22% under 1000 lux light-emitting diode (2700 K) illumination is demonstrated. In this work, the light intensities are measured carefully. Incorporated with the external quantum efficiency and photon flux spectrum, the integral current densities of the cells are calculated to confirm the reliability of the photovoltaic measurement. In addition, the devices show much better stability under continuous indoor light illumination. The results suggest that designing wide-bandgap active materials to meet the requirements for the indoor OPV cells has a great potential in achieving higher photovoltaic performance.
关键词： indoor application,power conversion efficiency,organic photovoltaic cells,photostability
更新于2025-09-11 14:15:04