Highly efficient porphyrin-sensitized solar cells with enhanced light harvesting ability beyond 800 nm and efficiency exceeding 10%

Wang, Chin‐Li; Hu, Jyun-Yu; Wu, Chia‐Hua; Kuo, Hshin-Hui; Chang, Yu‐Cheng; Lan, Zih-Jian; Wu, Hui-Ping; Diau, Eric Wei‐Guang; Lin, Che

doi:10.1039/c3ee44168g

Cited by 137 publications

(82 citation statements)

References 46 publications

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“…Through cosensitization, the PCE was further enhanced to 12.3% [39]. Many other porphyrin dyes were also tried to cosensitize with small molecular organic dyes and obtained high PCE values of over 10%, such as XW4 and C1 (10.45%) [34], XW4 and XS3 (10.75%) [43], and LD-31 and AN4 (10.3%) [44]. Except for porphyrin derivatives, cosensitization between pure organic dyes, especially for indoline dyes, has also been explored and obtained promising PCE improvements [35e38].…”

Section: Introductionmentioning

confidence: 97%

Cosensitization process effect of D-A-π-A featured dyes on photovoltaic performances

Liu

Chai

Zhang

et al. 2016

Green Energy & Environment

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Cosensitization based on two or multiple dyes as "dye cocktails" can hit the target on compensating and broadening light-harvesting region. Two indoline D-A-p-A motif sensitizers (WS-2 and WS-39) that possess similar light response area but distinctly reversed feature in photovoltaic performance are selected as the specific cosensitization couple. That is, WS-2 shows quite high photocurrent but low photovoltage, and WS-39 gives relatively low photocurrent but quite high photovoltage. Due to the obvious "barrel effect", both dyes show medium PCE around 8.50%. In contrast with the previous cosensitization strategy mostly focused on the compensation of light response region, herein we perform different cosensitization sequence, for taking insight into the balance of photocurrent and photovoltage, and achieving the synergistic improvement in power conversion efficiency (PCE). Electronic impedance spectra (EIS) indicate that exploiting dye WS-39 with high V OC value as the primary sensitizer can repress the charge recombination more effectively, resulting in superior V OC rather than using dye WS-2 with high J SC as the primary sensitizer. As a consequence, a high PCE value of 9.48% is obtained with the delicate cosensitization using WS-39 as primary dye and WS-2 as accessory dye, which is higher than the corresponding devices sensitized by each individual dye (around 8.48e8.67%). It provides an effective optimizing strategy of cosensitization how to combine the individual dye advantages for developing highly efficient solar cells.

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Section: Introductionmentioning

confidence: 97%

Cosensitization process effect of D-A-π-A featured dyes on photovoltaic performances

Liu

Chai

Zhang

et al. 2016

Green Energy & Environment

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“…27,28 In this work, the synthesis, fundamental properties, and photovoltaic performance of five anthracene-based dyes (denoted as AN-x) are reported in more details. The molecular structures of the AN-x dyes are shown in Chart 1.…”

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confidence: 99%

Cost-Effective Anthryl Dyes for Dye-Sensitized Cells under One Sun and Dim Light

et al. 2015

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A series of anthracene-based organic dyes were prepared via cost-effective synthetic procedures for dye-sensitized cell application. UV−visible and fluorescent spectra, electrochemical properties, and photovoltaic performance of the dyes were studied. Under one sun (100 mW/cm 2 ), the AN-3 small cell outperforms others in the series. Under a dim light condition, the AN-3 modules showed PCE comparable to that of the Z907 modules. After optimizing the synthetic procedure, we found that AN-3 can be manufactured at a fairly low price.

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“…[11][12][13][14][15][16][17][18][19] The improvements of PCE were usually associated with a decrease in V loss to some extent. [20][21][22][23][24][25][26][27][28][29] However, a targeted down-regulation of V loss , which simultaneously reduces the V loss involved in electron injection, dye regeneration and interfacial recombination processes, is scarcely reported. Here, we report a comprehensive control of V loss in DSSCs through judicious molecular engineering of the sensitizer and the redox mediator.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells

Zhang

Bahng

et al. 2018

Energy Environ. Sci.

154

141

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The relatively large voltage loss (V loss ) in excitonic type solar cells severely limits their power conversion efficiencies (PCEs). Here, we report a comprehensive control of V loss through efficacious engineering of the sensitizer and redox mediator, making a breakthrough in the PCE of dye-sensitized solar cells (DSSCs).The targeted down-regulation of V loss is successfully realized by three valid channels: (i) reducing the driving force of electron injection through dye molecular engineering, (ii) decreasing the dye regeneration overpotential through redox mediator engineering, and (iii) suppressing interfacial electron recombination.Significantly, the ''trade-off'' effect between the dye optical band gap and the open-circuit voltage (V OC ) is minimized to a great extent, achieving a distinct enhancement in photovoltaic performance (PCE 4 11.5%with V OC up to 1.1 V) for liquid junction cells. The solidification of the best-performing device leads to a PCE of 11.7%, which is so far the highest efficiency obtained for solid-state DSSCs. Our work inspires further development in highly efficient excitonic solar cells by comprehensive control of V loss . Broader contextExcitonic type solar cells, including dye-sensitized solar cells (DSSCs), perovskite solar cells (PSCs) and organic solar cells (OSCs), are potential alternatives for photovoltaic applications. To further advance their power conversion efficiencies (PCEs), it is crucial to reduce the so called voltage loss (V loss ) as much as possible. In DSSCs, the V loss mainly takes place in the electron injection, dye regeneration and interfacial recombination processes, whereas the targeted decreasing of V loss in all these aspects has been rarely reported. To address this issue, we herein demonstrate a comprehensive control of V loss , achieving 11.7% efficiency for solid-state DSSCs. This work is a good example of radically improving the PCE through rationally reducing V loss .

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Highly efficient porphyrin-sensitized solar cells with enhanced light harvesting ability beyond 800 nm and efficiency exceeding 10%

Cited by 137 publications

References 46 publications

Cosensitization process effect of D-A-π-A featured dyes on photovoltaic performances

Cosensitization process effect of D-A-π-A featured dyes on photovoltaic performances

Cost-Effective Anthryl Dyes for Dye-Sensitized Cells under One Sun and Dim Light

Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells

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