Performance enhancement of inverted perovskite solar cells through interface engineering by TPD based bidentate self-assembled monolayers

Kınaş

Intl J of Energy Research

et al. 2022

Self Cite

Summary Triboelectric nanogenerators (TENGs) are promising new generation systems with their basic motion‐based working principle using both triboelectric and electrostatic effects. Today, the energy densities of TENGs are insufficient for many electronic devices and new strategies are needed to increase their power conversion efficiency. In this study, two different Perylene‐based organic structures were added to the triboelectric layers as well as the electrochemical properties of these structures, and the device parameters related to these properties were investigated. A large variety of instrumental analyses, including cyclic voltammetry, contact angle, scanning electron microscopy, atomic force microscopy, and so on, have been used to identify the relationship between doped molecules, their doping ratios, and obtained fiber structures. Depending on molecular structure and even any small variations in side groups of molecules, different doping rates brought about various device outputs. Compared with undoped layers, doping of small molecules led to a ~3.3 times increase in the maximum power of the best‐performed devices, and a very high voltage value of 500 V was obtained. The analysis of doping with small molecules undertaken here has extended our knowledge of how material design improves the electrical output and contributes to the device performance in TENGs.

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular engineering‐device efficiency relation: Performance boosting of triboelectric nanogenerator through doping of small molecules

Kınaş

Intl J of Energy Research

et al. 2022

Self Cite

“…One molecule was bridged by a bithiophene linker and the other one was enriched with two hexyl chains. [ 192 ] It was found that the branched and long hexyl chain partially hinders the formation of conformal and dense monolayer due to steric hindrance, which may cause current leakage, inducing additional recombination losses, thus resulting in slightly lower PCE of 11.11% than the analog without hexyl chains (PCE of 13.19%).…”

Section: Sam‐based Htl (Sam‐htl)mentioning

confidence: 99%

Organic Hole‐Transport Layers for Efficient, Stable, and Scalable Inverted Perovskite Solar Cells

et al. 2022

Hole-transporting layers (HTLs) are an essential component in inverted, p-i-n perovskite solar cells (PSCs) where they play a decisive role in extraction and transport of holes, surface passivation, perovskite crystallization, device stability, and cost. Currently, the exploration of efficient, stable, highly transparent and low-cost HTLs is of vital importance for propelling p-i-n PSCs toward commercialization. Compared to their inorganic counterparts, organic HTLs offer multiple advantages such as a tunable bandgap and energy level, easy synthesis and purification, solution processability, and overall low cost. Here, recent progress of organic HTLs, including conductive polymers, small molecules, and self-assembled monolayers, as utilized in inverted PSCs is systematically reviewed and summarized. Their molecular structure, hole-transport properties, energy levels, and relevant device properties and resulting performances are presented and analyzed. A summary of design principles and a future outlook toward highly efficient organic HTLs in inverted PSCs is proposed. This review aims to inspire further innovative development of novel organic HTLs for more efficient, stable, and scalable inverted PSCs.

“…In recent years, thirdgeneration perovskite solar cells (PSCs), as an emerging PV technology, have attracted great attention due to their lowcost, high-efficiency, and solutionprocessable properties. At present, the power conversion efficiency (PCE) of PSCs has soared from 3.8% to 25.5% in the past decade [1,2] showing an astonishing development and attracting application prospects. The name of PSCs is derived from the light-harvesting materialorganic-inorganic hybrid metal halide, which has a perovskite crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Advances in Tin(II)‐Based Perovskite Solar Cells: From Material Physics to Device Performance

Gong

et al. 2021

Small Structures

During the past decade, metal halide perovskites are widely studied in the field of optoelectronic materials due to their unique optical and electrical properties. Lead‐based halide perovskite solar cells (PSCs), in particular, currently achieve a record efficiency of 25.5%, thus showing strong potential in industrial application. However, toxicity of lead‐based perovskite materials possesses great concerns to natural environment and human body. Therefore, the quest for nontoxic and eco‐friendly elements to replace lead in perovskites is of great interest. Among all the element choices, tin(II) (Sn2+) is the most promising candidate. As a rising star of lead‐free PSCs, Sn‐based PSCs have drawn much attention and made promising progress during the past few years. While the rapid oxidation and decomposition of Sn‐based perovskites result in poor stability and low efficiency of PSCs. In this review, structural, optoelectronic properties and the critical issues of Sn‐based perovskite materials are analyzed. Then, a detailed discussion on the recent methods in solving critical issues of Sn‐based perovskite devices, from optimization on materials physics to device performance, is also presented. Finally, remaining challenges and future perspective are given to advance the progression of Sn‐based PSCs.