Enhanced efficiency and thermal stability of mesoscopic perovskite solar cells by adding PC70BM acceptor

Ranjan, Rahul; Usmani, Belal; Ranjan, Sudhir; Weerasinghe, Hasitha; Singh, Anand Kumar; Garg, Ashish; Gupta, Raju Kumar

doi:10.1016/j.solmat.2019.110130

Cited by 25 publications

(7 citation statements)

References 36 publications

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“…Numerous attempts have been made to improve the stability of PSCs by achieving a high-quality perovskite layer. Notable improvements have been observed in the crystallinity, surface coverage, and grain size of perovskite films via Ostwald ripening, solvent annealing, solvent engineering, − gas treatment, and through additives. − Among these approaches, additive assisted perovskite crystal growth has been particularly effective to enhance the performance of PSCs as well as its stability. A ligand, 2-aminoethanethiol, was used in the perovskite precursor to interconnect lead iodide (PbI 2 ) and methylammonium iodide (MAI) that led to the simultaneous growth of PbI 2 and MAI crystals and ensured a dense perovskite film with improved stability .…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and Performance Enhancement of Perovskite Solar Cells Through Oxalic Acid-Induced Perovskite Formation

Afroz

Ghimire

Reza

et al. 2020

ACS Appl. Energy Mater.

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Achieving long-term stability along with high power conversion efficiency (PCE) is the biggest obstacle for the pursuit of organic−inorganic perovskite solar cells (PSCs) toward commercialization. Herein, we demonstrate additive assisted perovskite crystal growth as an effective strategy to improve both power conversion efficiency and thermal stability of methylammonium lead triiodide (MAPbI 3 ) perovskite solar cells. For this, oxalic acid (OA) with two bifacial carboxylic acid groups was employed as an additive into the perovskite precursor solution, which facilitated modulating the crystallization process leading to increase in grain size, reduced grain boundaries and trap states. Subsequently, devices fabricated with the OA additive showed a power conversion efficiency of 17.12%, compared to the control device with 14.06%. Furthermore, enhanced thermal stability was achieved for the OA-modified PSCs compared to that of the pristine device. The device without the OA additive retained 14% of the initial PCE after only 9 h of heat treatment at 100 °C, whereas for the same condition, the OA-modified device retained 90% after 9 h and even 70% after 19 h. These observations suggest that OA-assisted morphological improvement of perovskite can offer an efficient approach to further improve the performance as well as stability of the PSCs.

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Section: Introductionmentioning

confidence: 99%

Thermal Stability and Performance Enhancement of Perovskite Solar Cells Through Oxalic Acid-Induced Perovskite Formation

Afroz

Ghimire

Reza

et al. 2020

ACS Appl. Energy Mater.

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“…Moreover, some studies have demonstrated that external additives such as PCBM and NH 4 Cl in the perovskite structure can also have an effect on reducing defects and improving the stability of perovskites. [75][76][77] Herein, a summary of the stability…”

Section: Compositional Engineeringmentioning

confidence: 99%

Defects and stability of perovskite solar cells: a critical analysis

Duan

Uddin

2022

Mater. Chem. Front.

103

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“…203 However, despite the high electrical parameters of the fabricated devices, p-doping of PTAA HTL accelerated their degradation. Ranjan et al successfully employed PTAA as HTL in a mp-PSC based on a PC 70 BM acceptor additive in the perovskite absorber, 204 while Yang et al reported a very high, stable, efficiency of over 20% when used as HTL in a mp-TiO 2 ETL-based mp-PSCs with a NP-Al 2 O 3 barrier layer when they were effectively isolated from oxygen and humidity with solid encapsulation. 205 Qin et al investigated the influence of the solvent in the HTM solution on the cell performance.…”

Section: Hole Transport Materials In Mp-pscsmentioning

confidence: 99%