Enhancing near-infrared solar cell response using upconverting transparentceramics

Liu, M.; Lu, Yalin; Xie, Zhibin; Chow, Gan‐Moog

doi:10.1016/j.solmat.2010.09.018

Cited by 108 publications

(57 citation statements)

References 10 publications

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“…83 Furthermore, also other types of solar cells have been assisted by lanthanoid-based upconversion: De Wild et al have applied the Yb/Er system to amorphous silicon solar cells, in the form of a NaYF 4 :(18%Yb 3+ ,2%Er 3+ ) phosphor, 84,85 as well as in a more recent study employing a Gd 2 O 2 S:(10%Yb 3+ ,5%Er 3+ ) phosphor. 86 Liu et al have employed an yttrium-aluminium garnet (YAG) transparent ceramic co-doped with 3.0%Yb 3+ and 0.5%Er 3+ behind a dyesensitized solar cell (DSSC), 87 while Shan et al integrated Er 3+ and Yb 3+ co-doped into LaF 3 in a nanocomposite with TiO 2 to serve as upconversion layer in DSSCs. 88 Other examples of lanthanoid-based upconversion applied to DSSCs include the employment of fluorescence resonance energy transfer from upconversion centres, 89 the use of colloidal upconversion nanocrystals as an energy relay, 90 and direct electron injection from up-conversion nanoparticles to the TiO 2 photoanode.…”

Section: Photonic Upconversionmentioning

confidence: 99%

Photochemical upconversion: present status and prospects for its application to solar energy conversion

Schulze

Schmidt

2015

Energy Environ. Sci.

503

507

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All photovoltaic solar cells transmit photons with energies below the absorption threshold (bandgap) of the absorber material, which are therefore usually lost for the purpose of solar energy conversion. Upconversion (UC) devices can harvest this unused sub-threshold light behind the solar cell, and create one higher energy photon out of (at least) two transmitted photons. This higher energy photon is radiated back towards the solar cell, thus expanding the utilization of the solar spectrum. Key requirements for UC units are a broad absorption and high UC quantum yield under low-intensity incoherent illumination, as relevant to solar energy conversion devices, as well as long term photostability. Upconversion by triplet-triplet annihilation (TTA) in organic chromophores has proven to fulfil the first two basic requirements, and first proof-of-concept applications in photovoltaic conversion as well as photo(electro)chemical energy storage have been demonstrated. Here we review the basic concept of TTA-UC and its application in the field of solar energy harvesting, and assess the challenges and prospects for its large-scale application, including the long term photostablity of TTA upconversion materials.

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Section: Photonic Upconversionmentioning

confidence: 99%

Photochemical upconversion: present status and prospects for its application to solar energy conversion

Schulze

Schmidt

2015

Energy Environ. Sci.

503

507

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“…[13][14][15] One key feature and driving force of such activity is the possibility of sintering transparent ceramics to a near net shape, which has a potentially large economic and design impact, [ 16 ] particularly in comparison to machining the single-crystal bulk material. The general trend for reliable, mechanically robust ceramics has driven down grain sizes [ 17 , 18 ] to a regime requiring substantial attention to all the ceramic processing steps, from the powder synthesis to the sintering (i.e., fi ring).…”

Section: Introductionmentioning

confidence: 99%

Nanopore Characterization and Optical Modeling of Transparent Polycrystalline Alumina

Stuer

Bowen

Cantoni

et al. 2012

Adv Funct Materials

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Production of transparent ceramics has become a topic of resurgent interest in recent years, with its promise of near‐net shaping appealing to applications ranging from biomedicine to solar energy. However, the mechanisms governing ceramic transparency, translucency, and opaqueness are not entirely understood. Models of both grain boundary and pore scattering have been proposed, but too often without sufficient experimental corroboration. An extensive experimental analysis of transparent alumina samples is presented, establishing a first direct link between the observed transparency, defect size, and porosity. Given the unprecedented experimental detail from the full 3D pore reconstruction from the FIB tomography, how to correctly interpret the experimentally observed transparency is additionally shown. The unprecedented experimental and theoretical agreement for the first time identifies the relative contributions of different scattering mechanisms, thereby paving the way forward for microstructural tuning of transparent polycrystalline alumina.

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“…37 Other reports in which the UC material was placed at the rear of the DSSC device yielded a response though the UC EQE was said to be negligible. 38 Though a photocurrent (I sc ¼ 0.036 mA) was obtained under 980 nm excitation, the EQE was not reported. A preliminary study reporting the use of UC in conjunction with OPV devices again used a co-doped Yb 3þ -Er 3þ system yielding an EQE of 8 Â 10…”

Section: Introductionmentioning

confidence: 97%

Near infrared up-conversion in organic photovoltaic devices using an efficient Yb3+:Ho3+ Co-doped Ln2BaZnO5 (Ln = Y, Gd) phosphor

Adikaari

Etchart

Guering

et al. 2012

Journal of Applied Physics

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A novel and compact nanoindentation device for in situ nanoindentation tests inside the scanning electron microscope AIP Advances 2, 012104 (2012) Invited Review Article: Photopyroelectric calorimeter for the simultaneous thermal, optical, and structural characterization of samples over phase transitions Rev. Sci. Instrum. 82, 121101 (2011) Nanometer optomechanical transistor based on nanometer cavity optomechanics with a single quantum dot J. Appl. Phys. 110, 114308 (2011) Breakover mechanism of GaAs photoconductive switch triggering spark gap for high power applications J. Appl. Phys. 110, 094507 (2011) Additional information on J. Appl. Phys. co-doped Y 2 BaZnO 5 near-infrared up-converting phosphors with organic photovoltaic devices is reported. We show that it is possible to obtain a J sc of 16 lA cm À2 under 986 nm illumination ($390 mW cm À2 corresponding to $37 suns) leading to an up-conversion external quantum efficiency (g UC EQE ) of 0.0052%. Through modification of the organic photovoltaic devices to incorporate transparent electrodes we show that g UC EQE could be increased to 0.031 %, matching that achieved in amorphous-Si:H PV cells. Accounting for the full spectral range that may be absorbed by the phosphor ($870-1030 nm) yields an up-conversion power conversion efficiency (g UC PCE ) of 0.073% which again could be improved to 0.45% using transparent electrodes. This technique for utilizing the near-infrared spectral region may therefore offer a potential route to improving the performance of organic photovoltaic devices as research into discovering high-efficiency up-converting phosphors continues to provide improved materials. V C 2012 American Institute of Physics.

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Enhancing near-infrared solar cell response using upconverting transparentceramics

Cited by 108 publications

References 10 publications

Photochemical upconversion: present status and prospects for its application to solar energy conversion

Photochemical upconversion: present status and prospects for its application to solar energy conversion

Nanopore Characterization and Optical Modeling of Transparent Polycrystalline Alumina

Near infrared up-conversion in organic photovoltaic devices using an efficient Yb3+:Ho3+ Co-doped Ln2BaZnO5 (Ln = Y, Gd) phosphor

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