Design of a versatile interconnecting layer for highly efficient series-connected polymer tandem solar cells

Zuo, Lijian; Chang, Chih Yu; Chueh, Chu Chen; Zhang, Shuhua; Li, Hanying; Jen, Alex K.‐Y.; Chen, Hongzheng

doi:10.1039/c5ee00633c

Cited by 101 publications

(78 citation statements)

References 41 publications

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“…18 The PCEs of the state-of-the-art tandem OPV devices have been steadily improved in the range of 10-12% over the last few years, which can be mainly attributed to the design and development of highly efficient absorbers with complementary absorption spectra. [19][20][21][22][23][24][25] Moreover, the currently emerged novel absorbers, such as low-bandgap donors with absorption onsets over 900 nm, exhibiting unprecedented photocurrents; [26][27][28] absorbers with moderate bandgaps, [29][30][31] exhibiting extremely high FF and EQE; as well as absorbers with large bandgaps, [32][33][34] showing high V OC along with promising short circuit current ( J SC ), have already achieved promising photovoltaic performances for single-junction as well as tandem OPV devices. By fine-tuning the bandgap and thickness of an organic absorber for a respective sub-cell in combination with the advanced process technology, these novel absorbers have the potential to close the efficiency gap between the experimental achievements and the theoretical limitations.…”

Section: Introductionmentioning

confidence: 99%

Air-processed polymer tandem solar cells with power conversion efficiency exceeding 10%

Brabec

2015

Energy Environ. Sci.

162

132

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The power conversion efficiencies (PCEs) of the state-of-the-art organic tandem solar cells are steadily improved in the range of 10-12%, which can be mainly attributed to the design and development of highly efficient absorbers with complementary absorption spectra. However, the impressive recorded efficiencies are only achieved for devices spin-coated in an inert atmosphere, which does not directly contribute to the commercialization of the organic photovoltaic technology. Herein, we perform a systematic study of PTB7-Th-based single-junction solar cells fabricated under various conditions. The relatively low photovoltaic performance and poor environmental stability of the air-processed devices are successfully improved by a post-treatment with alcohol-based solvents. The effect of solvent treatment is valid for both regular and inverted device architecture. Tandem devices fabricated by doctor-blading in air achieve a high PCE of 10.03% along with an unprecedentedly high FF of 76.6%.

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Section: Introductionmentioning

confidence: 99%

Air-processed polymer tandem solar cells with power conversion efficiency exceeding 10%

Brabec

2015

Energy Environ. Sci.

162

132

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“…Over the last 15 years, organic photovoltaics have experienced slow but sustained progress. 1 From the earliest poly( p-phenylene vinylene) devices (with the low 3% power conversion efficiency (PCE)) [2][3][4] to the poly(3-hexylthiophene-2,5-diyl) devices (with 5% PCE) [5][6][7] and the state-of-the-art donoracceptor (D-A) photovoltaic devices (with 11% PCE), [8][9][10][11][12] the most common feature of these materials is their polymeric nature. However, Q6…”

Section: Q5mentioning

confidence: 99%

Rhodanine-based dyes absorbing in the entire visible spectrum

et al. 2017

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A series of new broad-absorbing dyes based on rhodanine derivatives conjugated with triarylamines through a fluorene backbone were synthesized. Spectroscopic and electrochemical characterizations, along with theoretical calculations, revealed interesting properties of the dyes that efficiently absorb in the entire visible spectrum Q4 .Please check this proof carefully. Our staff will not read it in detail after you have returned it.Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read. Please pay particular attention to: tabulated material; equations; numerical data; figures and graphics; and references. If you have not already indicated the corresponding author(s) please mark their name(s) with an asterisk. Please e-mail a list of corrections or the PDF with electronic notes attached -do not change the text within the PDF file or send a revised manuscript. Corrections at this stage should be minor and not involve extensive changes. All corrections must be sent at the same time.Please bear in mind that minor layout improvements, e.g. in line breaking, table widths and graphic placement, are routinely applied to the final version.

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“…Most studies have focused on the tandem architecture, in which identical or different absorber layers are used, resulting in maximum efficiencies in the range of 10-13%. [11][12][13][14][15][16][17][18][19][20][21][22] At least conceptually, stacking three absorber layers in a triple-junction solar cell can lead to a further increase in efficiency. There are few examples of triple-junction organic solar cells.…”

Section: Accurate Characterization Of Triple-junction Polymer Solar Cmentioning

confidence: 99%

Accurate Characterization of Triple‐Junction Polymer Solar Cells

Rasi

Hendriks

Wienk

et al. 2017

Advanced Energy Materials

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organic semiconductors have been developed to absorb light into the near infrared region. [8] The gain in spectral coverage and short-circuit current density (J SC ) in the cells is, however, counteracted by an unavoidable loss in the open-circuit voltage (V OC ) when the bandgap decreases. [9] Given the intrinsic limits of singlejunction organic solar cells, there has been an increasing interest to develop multijunction architectures. [10] This paves the way to efficient solar cells by an improved utilization of photon energy. In a multijunction solar cell sunlight is spectrally distributed over two, or more subcells such that highenergy photons are absorbed in a wide bandgap subcell and low-energy photons in a small bandgap subcell. This reduces the thermalization losses for high-energy photons and the transmission losses for the low-energy photons. Most studies have focused on the tandem architecture, in which identical or different absorber layers are used, resulting in maximum efficiencies in the range of 10-13%. [11][12][13][14][15][16][17][18][19][20][21][22] At least conceptually, stacking three absorber layers in a triple-junction solar cell can lead to a further increase in efficiency. There are few examples of triple-junction organic solar cells. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] The gain in efficiency achieved by these triple-junction devices was not always accompanied by a critical analysis of the measured performance. In a recent publication, Timmreck et al. methodically analyzed the literature on tandem organic solar cells, shedding light on the fact that the vast majority of the publications on organic tandem cells lacked a proper characterization. [42] Although the paper focused attention on the tandem structure, the argumentations provided can reasonably be extended to the case of triple-junctions. At present, the characterization of organic triple-junctions is often limited to measuring the J−V characteristics under simulated solar radiation and determining the external quantum efficiency (EQE) using different light sources to optically bias the subcells. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] Nevertheless, organic materials commonly employed for solar cells feature peculiar characteristics that necessitate special attention for their EQE measurement. [42][43][44] An accurate analysis of the effect of bias light and bias voltage on the EQE of triple-junction organic solar cells is necessary.Detailed protocols for the characterization of triple-junction solar cells are available in the literature. [45] For many inorganic triple-junction solar cells the effect of bias voltage on the spectral response is very small, which makes correction for bias voltage not critical. [45] The aim of this work is to provide a characterization protocol for organic triple-junction solar cells that take into account the uniqueness of these particular materials. In order to do so, we combine optical and electrical modeling, use

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Design of a versatile interconnecting layer for highly efficient series-connected polymer tandem solar cells

Abstract: A versatile interconnecting layer (ICL) based on reflective ultra-thin Ag (8–14 nm) was developed to enable the fabrication of a series-connected micro-cavity tandem polymer solar cell with a PCE up to 11% and a EQEMAXof >90%.

Cited by 101 publications

References 41 publications

Air-processed polymer tandem solar cells with power conversion efficiency exceeding 10%

Air-processed polymer tandem solar cells with power conversion efficiency exceeding 10%

Rhodanine-based dyes absorbing in the entire visible spectrum

Accurate Characterization of Triple‐Junction Polymer Solar Cells

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