Severe Morphological Deformation of Spiro-OMeTAD in (CH3NH3)PbI3 Solar Cells at High Temperature

Jena, Ajay Kumar; Ikegami, Machiko; Miyasaka, Tsutomu

doi:10.1021/acsenergylett.7b00582

Cited by 179 publications

(175 citation statements)

References 11 publications

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“…For future developments of perovskite photovoltaic modules, the device stability at high efficiency levels is essential for applications to gain the economically necessary market share. In the past, some perovskites as well as hole and electron transport materials showed performance decays at temperatures below the here‐extrapolated temperatures . New material and stack developments have to consider the layer temperatures and their potential fluctuation.…”

Section: Discussionmentioning

confidence: 99%

Outdoor Measurement and Modeling of Perovskite Module Temperatures

et al. 2018

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Photovoltaic cells and modules are exposed to partially rapid changing environmental parameters that influence the device temperature. The evolution of the device temperature of a perovskite module of 225 cm 2 area is presented during a period of 25 days under central European conditions. The temperature of the glass–glass packaged perovskite solar module is directly measured at the back contact by a thermocouple. The device is exposed to ambient temperatures from 3 to 34 °C up to solar irradiation levels exceeding 1300 W m −2 . The highest recorded module temperature is 61 °C under constant high irradiation levels. Under strong fluctuations of the global solar irradiance, temperature gradients of more than 3 K min −1 with total changes of more than 20 K are measured. Based on the experimental data, a dynamic iterative model is developed for the module temperature evolution in dependence on ambient temperature and solar irradiation. Furthermore, specific thermal device properties that enable an extrapolation of the module response beyond the measured parameter space can be determined. With this set of parameters, it can be predicted that the temperature of the perovskite layer in thin‐film photovoltaic devices is exceeding 70 °C under realistic outdoor conditions. Additionally, perovskite module temperatures can be calculated in final applications.

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Section: Discussionmentioning

confidence: 99%

Outdoor Measurement and Modeling of Perovskite Module Temperatures

et al. 2018

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“…In addition, the V1160 HTM was tested in a dopant‐free configuration. As dopants are known to chemically interact with the HTMs, it is advisable to search for the compounds that ensure sufficient performance without the use of additives. Interestingly, a device with dopant‐free V1160 showed better performance than that of the corresponding Spiro‐OMeTAD‐based device, resulting in a moderate PCE of 12.6%.…”

Section: Methodsmentioning

confidence: 99%

Application of a Tetra‐TPD‐Type Hole‐Transporting Material Fused by a Tröger's Base Core in Perovskite Solar Cells

et al. 2019

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One of the obstacles to the commercialization of perovskite solar cells (PSCs) is the high price and morphological instability of the most common hole‐transporting material (HTM) Spiro‐OMeTAD. Herein, a novel HTM, termed V1160, based on four N,N′‐bis(3‐methylphenyl)‐N,N′‐diphenylbenzidine (TPD)‐type fragments, fused by a Tröger's base core, is synthesized and successfully applied in PSCs. Investigation of the optical, thermal, and photoelectrical properties shows that V1160 is a suitable candidate for application as an HTM in PSCs. A promising power conversion efficiency (PCE) of over 18% is demonstrated, which is only slightly lower than that of Spiro‐OMeTAD. Moreover, V1160‐based devices exhibit improved performances in dopant‐free configurations and superior stability. Favorable morphological properties in combination with a simple synthesis make V1160 and related materials promising for HTM applications.

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“…However, such materials have hygroscopic and deliquescent properties that lead to HTL demolition, perovskite degradation, and short device lifespan. A few reports have investigated the adverse role of dopants . LiTFSI has deliquescence defined as the ability to absorb moisture in air, which is necessarily harmful to perovskite or spiro‐OMeTAD or both .…”

Section: Introductionmentioning

confidence: 99%

“…A few reports have investigated the adverse role of dopants . LiTFSI has deliquescence defined as the ability to absorb moisture in air, which is necessarily harmful to perovskite or spiro‐OMeTAD or both . In addition, LiTFSI gradually decreases adhesion at the interface between the perovskite layer and the HTL .…”

Section: Introductionmentioning

confidence: 99%

Hole Transport Materials in Conventional Structural (n–i–p) Perovskite Solar Cells: From Past to the Future

Kim

Choi

Kim

et al. 2020

Advanced Energy Materials

218

142

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With the application of organic–inorganic hybrid perovskites to liquid‐type solar cells, the unprecedented development of perovskite solar cells (Per‐SCs) has been boosted by the introduction of solid‐state hole transport materials (HTMs). The removal of liquid electrolyte has lead to improved efficiency and stability. Supported by high‐quality perovskite films, the certified efficiency of Per‐SCs has reached 25.2%. For Per‐SCs assembled in a conventional structure (n–i–p), the hole transport layer (HTL) plays an extra role in preventing the perovskite layer from external stimuli. In summary, the successful design and fabrication of the HTL must meet various requirements in terms of solubility, hole transport, recombination prevention, stability, and reproducibility, to name but a few. Many research strategies are focused on the development of high‐performance HTMs to meet such requirements. Such strategies for the development of HTMs employed in conventional n–i–p solar cells are reviewed herein. A vision of the future HTMs is proposed in this review based on the already proposed solutions and current trends.

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Severe Morphological Deformation of Spiro-OMeTAD in (CH₃NH₃)PbI₃ Solar Cells at High Temperature

Cited by 179 publications

References 11 publications

Outdoor Measurement and Modeling of Perovskite Module Temperatures

Outdoor Measurement and Modeling of Perovskite Module Temperatures

Application of a Tetra‐TPD‐Type Hole‐Transporting Material Fused by a Tröger's Base Core in Perovskite Solar Cells

Hole Transport Materials in Conventional Structural (n–i–p) Perovskite Solar Cells: From Past to the Future

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