Investigating the Superoxide Formation and Stability in Mesoporous Carbon Perovskite Solar Cells with an Aminovaleric Acid Additive

Péan, Emmanuel V.; Castro, Catherine S. P. De; Dimitrov, Stoichko D.; Rossi, Francesca De; Meroni, Simone; Baker, Jennifer; Watson, Trystan; Davies, Matthew L.

doi:10.1002/adfm.201909839

Cited by 37 publications

(31 citation statements)

References 42 publications

(74 reference statements)

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“…Unlike in other perovskite formulations, some humidity exposure is beneficial for AVA-MAPbI3 mCPSCs. Devices exposed to~70% RH for 24-28 h show significant PCE enhancement and significantly reduced hysteresis caused by improved crystallinity [27,97]. Water-mediated performance improvements in the absence of stability decreases are highly unusual and appear unique to the AVA-MAPbI 3 mCPSC.…”

Section: Organic Additivesmentioning

confidence: 99%

“…In mCPSCs, AVA-MAPbI 3 perovskites produce less superoxide under ambient conditions than MAPbI 3 as the high-quality scaffold infiltration limits oxygen access to grain surfaces. An additive stabilisation effect is therefore at work in mCPSCs, wherein superoxide is less easily generated and, when present, less able to induce perovskite degradation [96,97].…”

Section: Organic Additivesmentioning

confidence: 99%

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Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

et al. 2021

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Perovskite solar cells (PSCs) have already achieved comparable performance to industrially established silicon technologies. However, high performance and stability must be also be achieved at large area and low cost to be truly commercially viable. The fully printable triple-mesoscopic carbon perovskite solar cell (mCPSC) has demonstrated unprecedented stability and can be produced at low capital cost with inexpensive materials. These devices are inherently scalable, and large-area modules have already been fabricated using low-cost screen printing. As a uniquely stable, scalable and low-cost architecture, mCPSC research has advanced significantly in recent years. This review provides a detailed overview of advancements in the materials and processing of each individual stack layer as well as in-depth coverage of work on perovskite formulations, with the view of highlighting potential areas for future research. Long term stability studies will also be discussed, to emphasise the impressive achievements of mCPSCs for both indoor and outdoor applications.

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Section: Organic Additivesmentioning

confidence: 99%

Section: Organic Additivesmentioning

confidence: 99%

Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

et al. 2021

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“…To complete the device, perovskite is infiltrated into the device stack [8]. The stability is mostly due to the presence of the additive 5-aminovaleric acid (NH 2 (CH 2 ) 4 COOH, AVA) in the methylammonium lead iodide (CH 3 NH 3 PbI 3 , MAPI) crystal structure [9], which results in a 2D/3D structuring (AVA-MAPI) [7,10]. The highest reported PCE (power conversion efficiency) for such an architecture with mZrO 2 and AVA-MAPI is around 15% [11].…”

Section: Introductionmentioning

confidence: 99%

Scribing Method for Carbon Perovskite Solar Modules

et al. 2020

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The fully printable carbon triple-mesoscopic perovskite solar cell (C-PSC) has already demonstrated good efficiency and long-term stability, opening the possibility of lab-to-fab transition. Modules based on C-PSC architecture have been reported and, at present, are achieved through the accurate registration of each of the patterned layers using screen-printing. Modules based on this approach were reported with geometric fill factor (g-FF) as high as 70%. Another approach to create the interconnects, the so-called scribing method, was reported to achieve more than 90% g-FF for architectures based on evaporated metal contacts, i.e., without a carbon counter electrode. Here, for the first time, we adopt the scribing method to selectively remove materials within a C-PSC. This approach allowed a deep and selective scribe to open an aperture from the transparent electrode through all the layers, including the blocking layer, enabling a direct contact between the electrodes in the interconnects. In this work, a systematic study of the interconnection area between cells is discussed, showing the key role of the FTO/carbon contact. Furthermore, a module on 10 × 10 cm2 substrate with the optimised design showing efficiency over 10% is also demonstrated.

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“…During the past decade, organic–inorganic halide perovskites (PVKs) have risen as one of the most promising semiconductor families for various advanced applications in optoelectronics, such as light emitting diodes (LEDs) [ 1 ], lasers [ 1 ], photodetectors [ 2 ], scintillators [ 3 ], and solar cells [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. PVKs are especially promising for photovoltaic applications due to a broad range of favorable properties: (i) preparation from solutions, at low temperature and low cost, (ii) long charges diffusion lengths, (iii) direct optical transition, (iv) a bandgap that can be tuned by playing on the material composition, and (v) low exciton binding energy [ 2 , …”

Section: Introductionmentioning

confidence: 99%

“…AVA would play an active role in the high stability of PSCs due to surface defect passivation [ 30 ]. Recently, Péan et al [ 31 ] showed that methylammonium (MA + ) lead triiodide (MAPI) modified by AVA reduces the generation of superoxide when infiltrated in the triple-mesoporous layer stack. Its optimum content in the perovskite precursor solution is reported at 3–4% in the literature [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

et al. 2020

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During the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly, and it now approaches the record for single crystal silicon solar cells. However, these devices still suffer from a problem of stability. To improve PSC stability, two approaches have been notably developed: the use of additives and/or post-treatments that can strengthen perovskite structures and the use of a nontypical architecture where three mesoporous layers, including a porous carbon backcontact without hole transporting layer, are employed. This paper focuses on 5-ammonium valeric acid iodide (5-AVAI or AVA) as an additive in methylammonium lead iodide (MAPI). By combining scanning electron microscopy (SEM), X-ray diffraction (XRD), time-resolved photoluminescence (TRPL), current–voltage measurements, ideality factor determination, and in-depth electrical impedance spectroscopy (EIS) investigations on various layers stacks structures, we discriminated the effects of a mesoscopic scaffold and an AVA additive. The AVA additive was found to decrease the bulk defects in perovskite (PVK) and boost the PVK resistance to moisture. The triple mesoporous structure was detrimental for the defects, but it improved the stability against humidity. On standard architecture, the PCE is 16.9% with the AVA additive instead of 18.1% for the control. A high stability of TiO2/ZrO2/carbon/perovskite cells was found due to both AVA and the protection by the all-inorganic scaffold. These cells achieved a PCE of 14.4% in the present work.

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Investigating the Superoxide Formation and Stability in Mesoporous Carbon Perovskite Solar Cells with an Aminovaleric Acid Additive

Cited by 37 publications

References 42 publications

Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

Scribing Method for Carbon Perovskite Solar Modules

Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

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