Si-quantum-dot heterojunction solar cells with 16.2% efficiency achieved by employing doped-graphene transparent conductive electrodes

Kim, Jong Min; Kim, Sung Hoon; Shin, Dong Hwa; Seo, Sang Woo; Lee, Ha Seung; Kim, Woo Jung; Jang, Chan Wook; Kang, Soo Seok; Choi, Suk Ho; Kwak, Gyea Young; Kim, Kyung Joong; Lee, Hanleem; Lee, Hyoyoung

doi:10.1016/j.nanoen.2017.11.017

Cited by 49 publications

(34 citation statements)

References 37 publications

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“…Treating graphene by materials with larger electron positivity leads n‐type doping. There are lots of dopants for graphene including HNO 3 , SOCl 2 , Fe(NO 3 ) 3 , AuCl 3 , FeCl 3 , Na + , pyrene buanoic acid succidymidyl ester, bis(trifluoromethanesulfonyl)amide, bromine, and APTES…”

Section: Graphene‐based Hybrid Materialsmentioning

confidence: 99%

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

2018

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The rising demands of optoelectronic devices, such as flexibility, stretchability, and energy efficiency, urgently require alternative transparent conductive films (TCFs) for indium tin oxide. Among all the candidates such as carbon nanomaterials, metal nanomaterials, conductive polymers, and other nanocomposites, graphene is highly promising because of its distinct properties, such as outstanding conductivity, impressive optical transparency, remarkable mechanical flexibility, and chemical/thermal stability. However, the practical application of graphene‐based TCFs (G‐TCFs) is still challenging due to the difficulty for preparing large‐area crystalline graphene with few defects for TCFs. Many efforts have been made to solve these problems, and several kinds of optoelectronic devices have been successfully fabricated with G‐TCFs. This review presents the recent development in this area made by the authors and others, including the material systems and synthetic strategies of G‐TCFs, as well as their applications as transparent electrodes in optoelectronic devices such as field effect transistors, organic light‐emitting diodes, organic solar cells, and other devices. The current major challenges in this area and the potential practical solutions are identified.

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Section: Graphene‐based Hybrid Materialsmentioning

confidence: 99%

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

2018

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“…Maybe it can be assigned to the large surface area of GQDs, which increases the recombination rate of carriers. Kim et al inserted a layer of p‐type doped Si quantum dots (p‐SiQDs) at the Gr/Si interface and observed a great improvement in the PCE . They synthesized boron‐doped Si quantum dots with size of ≈3.5 nm as p‐SiQDs and covered them with thin SiO 2 for passivation.…”

Section: Engineering Gr/si Solar Cellsmentioning

confidence: 99%

“…Great efforts have been devoted to the optimization of Gr/Si solar cells. It has been reported that the world‐record efficiency of Gr/Si solar cells almost achieved a tenfold increase from 1.65% to 16.2% in the past 8 years. Figure lists some important nodes of optimization techniques of Gr/Si solar cells.…”

Section: Introductionmentioning

confidence: 99%

Progress of Graphene–Silicon Heterojunction Photovoltaic Devices

Huang

Cong

et al. 2018

Adv Materials Inter

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Solar cells fabricated with the most dominant material in industry, silicon (Si), developed rapidly in the recent years. Traditional Si solar cells require a complex process of fabricating junction. Thanks to its exotic electrical and optical properties, graphene (Gr) has attracted tremendous research interest in optoelectronic device applications, e.g., solar cells. The Gr/Si solar cell can be achieved by a simple room‐temperature transfer technique, which exhibits great potential application in photovoltaics. Currently, many researchers focus on the strategies to dope the Gr for the cell efficiency improvement, from 1.65% to 16.2%. Although great progress has been made, there are still some key issues to be solved on the way to the commercialization of Gr/Si solar cells. Here, the recent progress in the development of Gr/Si solar cells is comprehensively reviewed, and the road map of Gr/Si solar cell techniques in the future is discussed.

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“…Recently, novel materials, such as conductive polymers, [ 101,102 ] graphene, [ 103-106 ] CNTs, [ 107,108 ] transparent conductive oxides, [ 109 ] and metal nanowires, [ 110-112 ] have emerged as promising replacements for the traditional ITO and FTO transparent conductive electrodes, due to their high optical transmittance in the visible range and competitive electrical conductivity. Among these materials, graphene and its derivatives have attracted enormous research interest due to their low cost, nontoxicity, easy availability, superior stability, greater mechanical flexibility, and large specific surface area.…”

Section: Electrodesmentioning

confidence: 99%

Perovskite Solar Cells: Current Trends in Graphene‐Based Materials for Transparent Conductive Electrodes, Active Layers, Charge Transport Layers, and Encapsulation Layers

Muchuweni

Martincigh

Nyamori

2021

Adv Energy and Sustain Res

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Recent advancements in technology have inevitably led to a significant increase in the global energy demand, whose traditional energy sources, such as fossil fuels and nuclear energy, are failing to meet needs due to their nonrenewable nature and consequent depletion. [1][2][3][4][5][6] Moreover, fossil fuels and nuclear energy are major sources of environmental pollution, which is responsible for unfavorable global warming and climate change. [7][8][9] Hence, there has been considerable research interest in sustainable and renewable energy sources, particularly solar energy, due to its natural abundance and environmentally friendly nature. [10][11][12] In this regard, solar energy is most commonly converted into electricity by making use of the first-generation solar cells, i.e., crystalline silicon solar cells, that are now commercially available, with high power conversion efficiencies (PCEs) of above 26% [13,14] and superior environmental stability. [15] However, the largescale production of silicon-based solar cells is restricted by their high production cost, complicated fabrication procedures, rigidity, [16,17] and PCE, which is almost close to the theoretical limit of %29.4%. [18] As a result, the second-generation solar cells, i.e., thin-film solar cells, such as amorphous silicon (a-Si) solar cells, copper indium gallium selenide (CIGS) solar cells, and cadmium telluride (CdTe) solar cells, [19][20][21] and the third-generation solar cells, such as organic solar cells (OSCs), perovskite solar cells (PSCs), and dye-sensitized solar cells (DSSCs), [22][23][24][25][26][27] have been developed by using simple and low-cost fabrication procedures. Among these, the thirdgeneration solar cells have gained significant research attention due to an abundance of low-cost materials, solution processability, flexibility, lightweight, environmental friendliness, and ease of scaling-up. [28][29][30][31][32] Interestingly, PSCs are a rising star owing to their recent breakthrough in PCE, which has shown a rapid increase from 3.8% in 2009 [33,34] to %25.5% for the current state-of-the-art PSCs. [35] The superior performance of PSCs is mainly attributed to the exceptional properties of metal halide perovskites, including the large absorption coefficient, direct and tunable bandgap, low exciton binding energy at room temperature, ambipolar charge transport characteristics, high charge carrier mobility, slow recombination kinetics, and long electron-hole diffusion length. [36][37][38][39][40][41] Thus, metal halide perovskites are emerging semiconductor materials, described by the general formula of ABX 3 , where A is a monovalent cation, such as methylammonium (CH 3 NH 3 þ ; MA), formamidinium (CH 3 (NH 2 ) 2 þ ; FA), caesium (Cs þ ), or rubidium (Rb þ ); B is a divalent metal cation, such as lead (Pb 2þ ), tin (Sn 2þ ), or germanium (Ge 2þ ); and X is a halide anion, such as iodide (I À ), bromide (Br À ), or chloride (Cl À ).

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Si-quantum-dot heterojunction solar cells with 16.2% efficiency achieved by employing doped-graphene transparent conductive electrodes

Cited by 49 publications

References 37 publications

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

Progress of Graphene–Silicon Heterojunction Photovoltaic Devices

Perovskite Solar Cells: Current Trends in Graphene‐Based Materials for Transparent Conductive Electrodes, Active Layers, Charge Transport Layers, and Encapsulation Layers

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