Interface degradation of perovskite solar cells and its modification using an annealing-free TiO2 NPs layer

Xiong, Jian; Yang, Bingchu; Cao, Chunwei; Wu, Runsheng; Huang, Yulan; Sun, Jia; Zhang, Jian; Liu, Chengbin; Tao, Shaohua; Gao, Yongli; Yang, Junliang

doi:10.1016/j.orgel.2015.12.010

Cited by 100 publications

(71 citation statements)

References 38 publications

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“…Sun et al, Sun et al, Sun et al, and Crandall developed a set of physics‐based circuit models for a‐Si, perovskite, CIGS, and CdTe solar cells. These models also contain physical parameters pertaining to degradation pathways unique to these thin‐film technologies, eg, s f and s b in Sun et al can describe the interface degradation in a perovskite solar cell . Hence, these models enable diagnosis of these technology‐specific degradation processes.…”

Section: Discussionmentioning

confidence: 99%

“…These models also contain physical parameters pertaining to degradation pathways unique to these thin-film technologies, eg, s f and s b in Sun et al 25 can describe the interface degradation in a perovskite solar cell. 58 Hence, these models enable diagnosis of these technology-specific degradation processes. Second, some thin-film solar modules exhibit efficiency metastability (eg, light soaking 59 ), which needs special treatments in preprocessing the field data.…”

Section: Analyzing Thin-film Modules By the Suns-vmp Methodsmentioning

confidence: 99%

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Real‐time monitoring and diagnosis of photovoltaic system degradation only using maximum power point—the Suns‐Vmp method

Sun

Chavali

Alam

2018

Progress in Photovoltaics

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The uncertainties associated with technology‐specific and geography‐specific degradation rates make it difficult to calculate the levelized cost of energy, and thus the economic viability of solar energy. In this regard, millions of fielded photovoltaic modules may serve as a global testbed, where we can interpret the routinely collected time series maximum power point (MPP) data to assess the time‐dependent “health” of solar modules. The existing characterization methods, however, cannot effectively mine/decode these datasets to identify various degradation pathways. In this paper, we propose a new methodology called the Suns‐Vmp method, which offers a simple yet powerful approach to monitoring and diagnosing time‐dependent degradation of solar modules by using the MPP data. The algorithm reconstructs “IV” curves by using the natural illumination‐dependent and temperature‐dependent daily MPP characteristics as constraints to fit physics‐based circuit models. These synthetic IV characteristics are then used to determine the time‐dependent evolution of circuit parameters (eg, series resistance), which in turn allows one to deduce the dominant degradation modes (eg, solder bond failure) of solar modules. The proposed method has been applied to a test facility at the National Renewable Energy Laboratory. Our analysis indicates that the solar modules degraded at a rate of ~0.7%/year because of discoloration and weakened solder bonds. These conclusions are validated by independent outdoor IV measurements and on‐site imaging characterization. Integrated with physics‐based degradation models or machine learning algorithms, the method can also serve to predict the lifetime of photovoltaic systems.

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Section: Discussionmentioning

confidence: 99%

Section: Analyzing Thin-film Modules By the Suns-vmp Methodsmentioning

confidence: 99%

Real‐time monitoring and diagnosis of photovoltaic system degradation only using maximum power point—the Suns‐Vmp method

Sun

Chavali

Alam

2018

Progress in Photovoltaics

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“…Thus the CH3NH3PbI3 thin films on ITO/PEDOT:PSS substrates were prepared and exposed to air for a specified time. The XRD results proved that some degradation happened as the CH3NH3PbI3 thin films exposed to air (RH~45%) for 200 h due to the emergence of the diffraction peak coming from PbI2 crystals [41]. These CH3NH3PbI3 thin films exposed to air for a specified time were used to fabricate PHJ-PSCs with a structure of ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/Al.…”

Section: Planar Heterojunction Pscs With Interface Layer Tio2 Npsmentioning

confidence: 95%

“…The in-situ experiments observed with an optical microscope could follow the degradation process of PHJ-PSCs exposed to air at the initial stage ( Fig. 10 and the video in Ref [41]). The morphology indicated that there were lots of bubbles formed quickly, as indicated by the red arrows, and the bubble size became larger and larger with the exposure time extension.…”

Section: Planar Heterojunction Pscs With Interface Layer Tio2 Npsmentioning

confidence: 96%

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Interface modification for organic and perovskite solar cells

Wang

Yang

2016

Sci. China Mater.

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Organic solar cells (OSCs) continuously attract much attention due to their potentials as the low-cost and lightweight sources of renewable energy, and the power conversion efficiency (PCE) of the state-of-the-art OSCs has reached over 10.0%. Especially, there has been an unexpected breakthrough and rapid evolution of highly efficient organic-inorganic hybrid perovskite solar cells (PSCs), and the PCE has been improved to over 20%. The interface plays a very important role on the performance of both OSCs and PSCs, as well as their stability. It is imperative to control the interface properties and understand the mechanisms for obtaining highly efficient OSCs and PSCs. In this review, we will summarize our research progress on the interface modification of OSCs and PSCs using the electron transport layer and hole transport layer, as well as the molecular template layer.

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Overcoming the PCBM/Ag Interface Issues in Inverted Perovskite Solar Cells by Rhodamine‐Functionalized Dodecahydro‐Closo‐Dodecaborate Derivate Interlayer

Liu

Xiong

Wang

et al. 2023

Adv Funct Materials

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Efficient modification of the interface between metal cathode and electron transport layer are critical for achieving high performance and stability of the inverted perovskite solar cells (PSCs). Herein, a new alcohol-soluble rhodamine-functionalized dodecahydro-closo-dodecaborate derivate, RBH, is developed and applied as an efficient cathode interlayer to overcome the (6,6)-phenyl-C 61 butyrie acid methyl ester (PCBM)/Ag interface issues. By introducing RBH cathode interlayer, the functions of the interface traps passivation, interfacial hydrophobicity enhancement, interface contact improvement as well as built-in potential enhancement are realized at the same time and thus correspondingly improve the device performance and stability. Consequently, a power conversion efficiency (PCE) of 21.08% and high fill factor of 83.37% are achieved, which is one of the highest values based on solution-processed MAPbI 3 /PCBM heterojunction PSCs. Moreover, RBH can act as a shielding layer to slow down moisture erosion and self-corrosion. The PCE of the RBH devices still maintain 84% for 456 h (85 °C @ N 2 ), 87% for 360 h (23 °C @ relative humidity (RH) 35%) of its initial PCE value, while the control device can only maintain ≈23%, 58% of its initial PCE value under the same exposure conditions, respectively.

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Interface degradation of perovskite solar cells and its modification using an annealing-free TiO2 NPs layer

Cited by 100 publications

References 38 publications

Real‐time monitoring and diagnosis of photovoltaic system degradation only using maximum power point—the Suns‐Vmp method

Real‐time monitoring and diagnosis of photovoltaic system degradation only using maximum power point—the Suns‐Vmp method

Interface modification for organic and perovskite solar cells

Overcoming the PCBM/Ag Interface Issues in Inverted Perovskite Solar Cells by Rhodamine‐Functionalized Dodecahydro‐Closo‐Dodecaborate Derivate Interlayer

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