Self-Assembled Amphiphilic Block Copolymers/CdTe Nanocrystals for Efficient Aqueous-Processed Hybrid Solar Cells

Li, Jun-Huan; Li, Yilin; Xu, Jun‐Ting; Luscombe, Christine K.

doi:10.1021/acsami.7b03074

Cited by 33 publications

(30 citation statements)

References 49 publications

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“…[31,32] As shown in Figure 4d, the decay dynamics of ZnO:CdTe film are faster, which means better electron extraction efficiency compared with TiO 2 :CdTe films. [2,5,[7][8][9]13,15,17,[33][34][35][36][37][38][39][40] It is shown that the highest PCE (6.51%) and J sc (19.5 mA cm −2 ) have been obtained in this work. As a result, the probability of carrier recombination process becomes smaller.…”

mentioning

confidence: 54%

“…In addition, the PCE and J sc in this work are compared with those previously published articles based on AHSC (Figure 5) and other performance parameter values are shown in Table S4 in the Supporting Information. [2,5,[7][8][9]13,15,17,[33][34][35][36][37][38][39][40] It is shown that the highest PCE (6.51%) and J sc (19.5 mA cm −2 ) have been obtained in this work.…”

Section: Hybrid Solar Cellsmentioning

confidence: 99%

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Highly Efficient Aqueous‐Processed Hybrid Solar Cells: Control Depletion Region and Improve Carrier Extraction

Chen

Jin

Wang

et al. 2019

Advanced Energy Materials

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on poly(p-phenylenevinylene) (PPV) and CdTe nanocrystals (NCs) was developed. [2] This work demonstrated the important influence of hybrid on the performance of solar cells based on aqueous process, encouraging us to further investigate the ASCs with a new configuration.However, the performance of the ASCs is still severely limited by the narrow width of the depletion region, the intrinsic defects of NCs, and the low carrier extraction ability, resulting in low short-circuit current (J sc ) and open voltage (V oc ) as well as a poor fill factor (FF). Many methods including passivating the surface of NCs, [3][4][5] high temperature annealing, [6] designing polymer with novel structure, [2,[7][8][9][10][11] optimizing device architecture, [12][13][14] etc. are developed to address these issues. For example, Wei et al. successfully designed conjugated polymer with high carrier mobility and largely improved device performance. [15] Jin et al. achieved a record PCE of 5.64% (as reported) based on PPV and CdTe NCs by optimizing device structure. [16] However, controlling the width of the depletion region and enhancing carrier extraction ability have been long a challenge.To address these issues, our group further developed an effective strategy that introduced different BHJ structure into the active material. The highest PCE as high as 6.01% was achieved based on ASCs. [17] In that work, one BHJ is consisted of CdTe and TiO 2 NCs and the other is CdTe NCs and PPV. The width of the depletion region and carrier extraction ability were significantly improved compared to previous works. As known, within limits, the thicker the BHJ film is, the better the performance is. In organic solar cells, the BHJ thickness can even reach 210 nm. [18] For aqueous-processed hybrid solar cells (AHSCs), however, the optimum thickness of the CdTe:TiO 2 BHJ film is only ≈30 nm in the double-side bulk heterojunction system mentioned above. In order to increase the BHJ film thickness and form the bicontinueous phase, the content of TiO 2 NCs have to be enhanced because of their small size. However, TiO 2 NCs contribute no photocurrent in the range of visible light and hence further increasing the thickness of BHJ film leads to the decrease of J sc . Although employing TiO 2 NCs with a larger size can obtain a thicker BHJ film and alleviate the decrease of J sc in theory, preparing water-soluble annatase TiO 2 with larger size is difficult and the aggregation occurs during Environmental friendly aqueous-processed solar cells have become one of the most promising candidates for the next-generation photovoltaic devices. Researchers have made lots of progress in designing active materials with novel structures, manipulating the defects in active materials, optimizing device architecture, etc. However, it has long been a challenge to control the width of the depletion region and enhance carrier extraction ability. Fabrication of a thick bulk heterojunction (BHJ) film is an effective strategy to address these issues but difficult to realize. Herein...

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mentioning

confidence: 54%

Section: Hybrid Solar Cellsmentioning

confidence: 99%

Highly Efficient Aqueous‐Processed Hybrid Solar Cells: Control Depletion Region and Improve Carrier Extraction

Chen

Jin

Wang

et al. 2019

Advanced Energy Materials

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“…[43][44][45][46][47] Severalr eview articles have been published on different strategies to improve the performance of lab-scale PSCs. [48][49][50][51][52][53][54][55][56][57] As it is typical for novel technologies, [58][59][60][61][62] research in the field of PSCs is currently focusedo no vercoming important issues, starting from the difficulty of reproducing high power conversion efficiency (PCE) values when the devicea rea is increaseda tt he module level. Secondly,t he selection of cell components must be reconsidered thinking at al arge-scale commercialization because some of the standard materials (like HTMs)c urrently used in lab-scale devices have unrealistic costs for at hird generation photovoltaict echnology.…”

Section: Introductionmentioning

confidence: 99%

Caesium for Perovskite Solar Cells: An Overview

Bella

Renzi

Cavallo

et al. 2018

Chemistry A European J

147

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Perovskite solar cells have the potential to revolutionize the world of photovoltaics, and their efficiency close to 23 % on a lab-scale recently certified this novel technology as the one with the most rapidly raising performance per year in the whole story of solar cells. With the aim of improving stability, reproducibility and spectral properties of the devices, in the last three years the scientific community strongly focused on Cs-doping for hybrid (typically, organolead) perovskites. In parallel, to further contrast hygroscopicity and reach thermal stability, research has also been carried out to achieve the development of all-inorganic perovskites based on caesium, the performances of which are rapidly increasing. The potential of caesium is further strengthened when it is used as a modifying agent of charge-carrier layers in solar cells, but also for the preparation of perovskites with peculiar optoelectronic properties for unconventional applications (e.g., in LEDs, photodetectors, sensors, etc.). This Review offers a 360-degree overview on how caesium can strongly tune the properties and performance of perovskites and relative perovskite-based devices.

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“…By contrast, spherical crystalline micelles basically have no growth process and two‐dimensional lamellar micelles grow along four directions. The cylindrical micelles of BCPs also have a wide range of potential applications in various fields, including optoelectronic materials, catalysis and biomedical materials . The high aspect ratio of cylindrical micelles is advantageous to applications under some situations, as compared with the micelles with other morphologies.…”

Section: Introductionmentioning

confidence: 99%

“…The cylindrical micelles of BCPs also have a wide range of potential applications in various fields, including optoelectronic materials, catalysis and biomedical materials. [78][79][80][81][82][83][84][85][86][87] The high aspect ratio of cylindrical micelles is advantageous to applications under some situations, as compared with the micelles with other morphologies. For instance, worm-like micelles can toughen epoxy resin more effectively, [88] and conductive network can be formed more easily when cylindrical micelles with a conjugated core-forming block are used as filler.…”

Section: Introductionmentioning

confidence: 99%

One‐dimensional growth kinetics for formation of cylindrical crystalline micelles of block copolymers

Zhang

2019

Polymer Crystallization

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One‐dimensional cylindrical micelles of block copolymers (BCPs) with a crystalline core have many advantages and potential applications. Their properties and performance are tightly related to their length. In this review, the growth kinetics and length control of cylindrical crystalline micelles of BCPs are commented. The pathways for formation of crystalline micelles are first introduced, and then the methods for preparing seed micelles (such as sonication and self‐seeding) as well as regulation of the number and crystallinity of the seed micelles are presented. The kinetics for two growth modes starting from the seed micelles, that is, epitaxial growth of unimers onto the seed micelles and end‐to‐end coupling among different micelles, are derived and various factors affecting the growth kinetics and structure of the obtained micelles, including external conditions and BCP structure, are discussed.

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Self-Assembled Amphiphilic Block Copolymers/CdTe Nanocrystals for Efficient Aqueous-Processed Hybrid Solar Cells

Cited by 33 publications

References 49 publications

Highly Efficient Aqueous‐Processed Hybrid Solar Cells: Control Depletion Region and Improve Carrier Extraction

Highly Efficient Aqueous‐Processed Hybrid Solar Cells: Control Depletion Region and Improve Carrier Extraction

Caesium for Perovskite Solar Cells: An Overview

One‐dimensional growth kinetics for formation of cylindrical crystalline micelles of block copolymers

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