Tandem structure: a breakthrough in power conversion efficiency for highly efficient polymer solar cells

Shi, Zhenzhen; Bai, Yiming; Chen, Xiaohan; Zeng, Rui; Tan, Zhan’ao

doi:10.1039/c8se00601f

Cited by 30 publications

(22 citation statements)

References 192 publications

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“…To compare the performance with other results published in the literature, we calculate the efficiency enhancements of the tandem devices related to the corresponding single junction cells and the results are shown in Figure 6(b). [7,11,12,14,15,[26][27][28][29][30][31][32][33][34][35][36][37][38][39] The enhancement factor is defined as the percentage increase of PCE of the tandem cell from the higher efficiency single-junction OPV device. Comparing with the reported values, device C gives the highest enhancement factor of 53%.…”

Section: Reproducibility and Compatibility Of Iclmentioning

confidence: 99%

High‐Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer

Kim

Xiong

et al. 2020

Advanced Energy Materials

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Tandem structure provides a practical way to realize high efficiency organic photovoltaic cells due to the limited optical absorption in organic semiconductors, it can be used to extend the wavelength coverage of the solar spectrum for light harvesting. The interconnecting layer (ICL) between subcells plays a critical role in the reproducibility and performance of tandem solar cells, yet the processability of the ICL has been a challenge. In this work we report on the fabrication of highly reproducible and efficient tandem solar cells by employing a commercially available material, PEDOT:PSS HTL Solar (HSolar), as the hole transporting material used for the ICL. Comparing with the conventional PEDOT:PSS Al 4083 (c-PEDOT), HSolar offers a better wettability on the underlying non-fullerene photoactive layers, resulting in better charge extraction properties of the ICL. When FTAZ:IT-M and PTB7-Th:IEICO-4F are used as the front cell and the back cell, a power conversion efficiency (PCE) of 14.7% is achieved in the tandem solar cell. To validate the processability of these tandem solar cells, three other research groups have successfully fabricated tandem devices using the same recipe and the highest PCE obtained is 16.1%. With further development of donor polymers and device optimization, our device simulation results show that a PCE > 22% can be realized in tandem cells in the near future.

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Section: Reproducibility and Compatibility Of Iclmentioning

confidence: 99%

High‐Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer

Kim

Xiong

et al. 2020

Advanced Energy Materials

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“…At first, the machine‐learning models were developed using 70 tandem OSCs (37 conventional and 33 inverted tandem OSCs), which can be seen as the data points. The experimental electronic parameters of active blends (seen as input parameters) and the PCE values of tandem OSCs (seen as output parameters) can be found in a previous review article . The dataset supporting the result of this study is available from the corresponding author upon request.…”

Section: Methodsmentioning

confidence: 86%

Performance and Matching Band Structure Analysis of Tandem Organic Solar Cells Using Machine Learning Approaches

Lee

2019

Energy Tech

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Organic solar cells (OSCs) based on tandem configuration have been drastically studied for boosting power conversion efficiency (PCE) in the the past decade and are a potential improvement to current commercial photovoltaic solar cell technology. Although a series of promising efficiency achievements on tandem OSCs have been reported, the crucial issue is how to estimate tandem OSCs performance based on known physical properties of different photoactive materials. Herein, a set of electronic features of photovoltaic materials is trained using machine‐learning algorithms for accurate efficiency predictions of tandem OSCs. The well‐trained machine‐learning model presented herein aims at 1) designing the matching band structures of active blends in each sub‐cell and 2) identifying the characteristics of the materials to be used to achieve high PCE values. The machine‐learning approach provides an effective strategy for suggesting the ideal properties of photovoltaic materials in terms of highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), and bandgap, which is useful for the rational design of high‐efficiency tandem OSCs.

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“…So far, serially connected 2T monolithic perovskite/Si TSCs with a record efficiency of 27.3% (device area is 1 cm 2 ) and 25.2% (device area is 1.419 cm 2 ) have been recently reported by Oxford PV and EPFL, respectively . However, monolithic devices have been restricted by suitable sub‐cells with matched bandgap and high‐quality recombination layers, which need to satisfy the requirements of current matching and reduced parasitic absorption; otherwise, the unmatched output current will severely reduce the performance of TSCs …”

Section: Strategies Toward Extending Nir Pv Response Of Pscsmentioning

confidence: 99%

Strategies Toward Extending the Near‐Infrared Photovoltaic Response of Perovskite Solar Cells

et al. 2019

Self Cite

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The emerging perovskite materials present great opportunities for cost‐saving and efficient photovoltaic devices. However, perovskite solar cells (PSCs) suffer from the limitation of short optical absorption edge, resulting in most of the near‐infrared (NIR) light being wasted. Recently, strategies toward broadening the NIR spectra response and further improve the power conversion efficiency of PSCs have attracted extensive attention. In this review, the unique features of perovskite materials are first introduced; subsequently, the current developments of organic–inorganic hybrid PSCs and all‐inorganic PSCs are highlighted. Then, a detailed summary of the strategies toward enhancing the NIR light harvesting of PSCs, namely, perovskite/Si and perovskite/Cu(In1–x, Gax)Se2 tandem solar cells (TSCs) and the integrated perovskite/organic solar cells (IPOSCs), is presented. After an in‐depth understanding of the working mechanism of TSCs and IPOSCs, a comprehensive overview about their recent developments, key detrimental factors restricting their further performance enhancement, and feasible countermeasures to conquer these scientific and technological problems are given. In the end, the perspectives on the related materials and devices are addressed.

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Tandem structure: a breakthrough in power conversion efficiency for highly efficient polymer solar cells

Abstract: Tandem structure enables a breakthrough in power conversion efficiency for highly efficient polymer solar cells.

Cited by 30 publications

References 192 publications

High‐Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer

High‐Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer

Performance and Matching Band Structure Analysis of Tandem Organic Solar Cells Using Machine Learning Approaches

Strategies Toward Extending the Near‐Infrared Photovoltaic Response of Perovskite Solar Cells

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