Enhanced Charge Separation by Sieve‐Layer Mediation in High‐Efficiency Inorganic‐Organic Solar Cells

Lin, Chien Hung; Chattopadhyay, Surojit; Hsu, Chia Wen; Wu, Meng Hsiu; Chen, Wei Chao; Wu, Chien Ting; Tseng, Shao-Chin; Hwang, Jenn-Shyong; Lee, Jiun-Haw; Chen, Chun-Wei; Chen, Cheng Hsuan; Chen, Li‐Chyong; Chen, Kuei‐Hsien

doi:10.1002/adma.200701309

Cited by 39 publications

(12 citation statements)

References 25 publications

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“…Therefore, developing new methods to engineer the interfacial properties directly may offer effective pathways for the improvement of the performance of BHJ polymer solar cells. Such direct modification of the donor/acceptor interfaces has been reported previously in an organic/inorganic heterojunction solar cell, consisting of vacuum‐deposited Zn phthalocyanine (ZnPC) and n‐silicon bilayer,35 wherein a thin SiO x sieve layer of 0.9–2.9 nm thickness was inserted between the ZnPc(donor) and Si(acceptor), which efficiently blocked hole diffusion into the acceptor layer and thereby decreased carrier recombination 16, 35. It is not trivial to embed this type of passivation layer into the microscopic interfaces meandering through three‐dimensionally networked semiconducting polymer/PCBM domains by conventional layer‐by‐layer deposition processes as mentioned above.…”

supporting

confidence: 61%

“…The Si 2p signals in the XPS correspond to the Si 3+ oxidation state, as indicated by the binding‐energy range of ≈101–104 eV ( Figure c) 46. Partially oxidized Si species have been known for their effective hole blocking and electron tunneling capabilities 35. An ultrathin SiO 2 layer was also utilized as a cathode passivation layer in the field of silicon‐based solar cells 47.…”

mentioning

confidence: 99%

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Photovoltaic Efficiency Enhancement by the Generation of an Embedded Silica‐Like Passivation Layer along the P3HT/PCBM Interface Using an Asymmetric Block‐Copolymer Additive

et al. 2012

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supporting

confidence: 61%

mentioning

confidence: 99%

Photovoltaic Efficiency Enhancement by the Generation of an Embedded Silica‐Like Passivation Layer along the P3HT/PCBM Interface Using an Asymmetric Block‐Copolymer Additive

et al. 2012

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“…Studies on interfaces are therefore attracting a great deal of attention. Several classes of materials, such as LiF, Cs 2 CO 3 , CsF, titanium chelate (TIPD, TOPD) and others [17][18][19] , have been used to improve PSC performance. However, devices based on these metallic salts need to be prepared by vacuum deposition, which limits their application in low-cost and large-area fabrication.…”

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confidence: 99%

Efficient polymer solar cells employing a non-conjugated small-molecule electrolyte

et al. 2015

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Polymer solar cells have drawn a great deal of attention due to the attractiveness of their use in renewable energy sources that are potentially lightweight and low in cost. Recently, numerous significant research efforts have resulted in polymer solar cells with power conversion efficiencies in excess of 9% (ref. 1). Nevertheless, further improvements in performance are sought for commercial applications. Here, we report polymer solar cells with a power conversion efficiency of 10.02% that employ a non-conjugated small-molecule electrolyte as an interlayer. The material offers good contact for photogenerated charge carrier collection and allows optimum photon harvesting in the device. Furthermore, the enhanced performance is attributed to improved electron mobility, enhanced active-layer absorption and properly active-layer microstructures with optimal horizontal phase separation and vertical phase gradation. Our discovery opens a new avenue for single-junction devices by fully exploiting the potential of various material systems with efficiency over 10%.In recent decades, polymer solar cells (PSCs) based on conjugated polymers as donors (D) blended with fullerene derivatives as acceptors (A) have received an enormous amount of attention in renewable energy sources because of the promise of low cost, flexibility and large-area fabrication 2-5 . To date, the best reported power conversion efficiency (PCE) in PSCs is ∼9-10%, but most values remain below 10%, especially in single-junction PSCs 6-11 . It is therefore highly desirable to develop novel materials and devices for the creation of single-junction PSCs with excellent efficiencies.To achieve such high efficiencies, energy loss in PSCs should be minimized. In general, energy loss originates directly from the reflection, transmission, exciton recombination and exciton annihilation of active and/or interface layers, as well as the accumulation on electrodes. The key is therefore to develop suitable materials for active and interfacial layers that can significantly reduce the loss of energy. For active-layer materials, considerable progress has been demonstrated with broadband absorption and high carrier mobility, resulting in state-of-the-art single-junction PSCs with PCEs up to ∼10% 12,13 . Meanwhile, triple-junction tandem devices have also been developed that achieve a high PCE of 11.5%, by combining different high-performance active-layer materials [14][15][16] . Before the studies on active-layer materials and devices, the interlayer between the cathode and active layer was also thought to be an important factor in the realization of highly efficient PSCs by avoiding the accumulation of excitons. The selection of proper electrodes with matched workfunctions is an effective method to reduce this accumulation and improve efficiency. However, the availability of suitable electrodes is limited for the emerging active-layer materials of different energy levels, so some investigators have suggested using an interfacial layer between the active layer and electro...

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“…If the Ag layer is too thin (<10 nm), it cannot form a continuous film, which may affect the carrier collection. Thus, similar to previous reports [26,30], a thickness of about 15-20 nm was usually used for semi-transparent metal in order to optimize the optical and electrical properties. The illumination of the active region can be estimated from the area (0. is shown.…”

Section: Methodsmentioning

confidence: 93%

Efficient light harvesting and carrier transport in PbS quantum dots/silicon nanotips heterojunctions

Huang¹,

Wang²,

Wang³

et al. 2011

J. Phys. D: Appl. Phys.

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Light harvesting from nanocomposites consisting of silicon (Si) nanotips and PbS quantum dots (QDs) has been investigated. We show that Si nanotips provide direct carrier transport paths, additional interfacial area and light trapping. We observe that there is a dramatic enhancement in short-circuit current (from 9.34 to 14.17 mA cm −2) with nanotips structure than that of the bulk Si wafer. In addition, with an additional electron blocking layer, the photovoltaic performance can be further increased. The nanocomposites consisting of QDs and Si nanotips therefore open a promising route for efficient light harvesting from visible to infrared with improved power conversion efficiency.

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Enhanced Charge Separation by Sieve‐Layer Mediation in High‐Efficiency Inorganic‐Organic Solar Cells

Cited by 39 publications

References 25 publications

Photovoltaic Efficiency Enhancement by the Generation of an Embedded Silica‐Like Passivation Layer along the P3HT/PCBM Interface Using an Asymmetric Block‐Copolymer Additive

Photovoltaic Efficiency Enhancement by the Generation of an Embedded Silica‐Like Passivation Layer along the P3HT/PCBM Interface Using an Asymmetric Block‐Copolymer Additive

Efficient polymer solar cells employing a non-conjugated small-molecule electrolyte

Efficient light harvesting and carrier transport in PbS quantum dots/silicon nanotips heterojunctions

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