High Efficiency Solution Processed Sintered CdTe Nanocrystal Solar Cells: The Role of Interfaces

Nano Letters ◽  
2014 ◽  
Vol 14 (2) ◽  
pp. 670-675 ◽  
Author(s):  
Matthew G. Panthani ◽  
J. Matthew Kurley ◽  
Ryan W. Crisp ◽  
Travis C. Dietz ◽  
Taha Ezzyat ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Solution Processed ◽  
Cdte Nanocrystal

On the role of solution-processed bathocuproine in high-efficiency inverted perovskite solar cells

Solar Energy ◽  
2021 ◽  
Vol 218 ◽  
pp. 142-149
Author(s):  
Shou-En Chiang ◽  
Anjali Chandel ◽  
Diksha Thakur ◽  
Yan-Ta Chen ◽  
Pei-Chen Lin ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Solution Processed

scholarly journals Solution-Processed CdTe Thin-Film Solar Cells Using ZnSe Nanocrystal as a Buffer Layer

2018 ◽  
Vol 8 (7) ◽  
pp. 1195 ◽  
Author(s):  
Yanru Chen ◽  
Xianglin Mei ◽  
Xiaolin Liu ◽  
Bin Wu ◽  
Junfeng Yang ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Buffer Layer ◽  
High Efficiency ◽  
Low Cost ◽  
Buffer Layers ◽  
Thin Film Solar Cells ◽  
Solution Processed ◽  
Cdte Nanocrystal ◽  
First Time

The CdTe nanocrystal (NC) is an outstanding, low-cost photovoltaic material for highly efficient solution-processed thin-film solar cells. Currently, most CdTe NC thin-film solar cells are based on CdSe, ZnO, or CdS buffer layers. In this study, a wide bandgap and Cd-free ZnSe NC is introduced for the first time as the buffer layer for all solution-processed CdTe/ZnSe NC hetero-junction thin-film solar cells with a configuration of ITO/ZnO/ZnSe/CdTe/MoOx/Au. The dependence of the thickness of the ZnSe NC film, the annealing temperature and the chemical treatment on the performance of NC solar cells are investigated and discussed in detail. We further develop a ligand-exchanging strategy that involves 1,2-ethanedithiol (EDT) during the fabrication of ZnSe NC film. An improved power conversion efficiency (PCE) of 3.58% is obtained, which is increased by 16.6% when compared to a device without the EDT treatment. We believe that using ZnSe NC as the buffer layer holds the potential for developing high-efficiency, low cost, and stable CdTe NC-based solar cells.

Safer salts for CdTe nanocrystal solution processed solar cells: the dual roles of ligand exchange and grain growth

2015 ◽  
Vol 3 (24) ◽  
pp. 13057-13065 ◽  
Author(s):  
Troy K. Townsend ◽  
William B. Heuer ◽  
Edward E. Foos ◽  
Eric Kowalski ◽  
Woojun Yoon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Growth ◽  
Ligand Exchange ◽  
Dual Role ◽  
Salt Treatment ◽  
Dual Roles ◽  
Solution Processed ◽  
Cdte Nanocrystal

The dual role of salt treatment was revealed by replacing conventional CdCl2 with non-toxic NH4Cl to simultaneously exchange native ligands and promote grain growth in inorganic CdTe nanocrystal solar cells.

scholarly journals Solution-Processed Transparent Conducting Electrodes for Flexible Organic Solar Cells with 16.61% Efficiency

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Juanyong Wan ◽  
Yonggao Xia ◽  
Junfeng Fang ◽  
Zhiguo Zhang ◽  
Bingang Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Electrical Stability ◽  
Solution Processed ◽  
Good Thermal Stability ◽  
Transparent Conducting ◽  
High Flexibility

AbstractNonfullerene organic solar cells (OSCs) have achieved breakthrough with pushing the efficiency exceeding 17%. While this shed light on OSC commercialization, high-performance flexible OSCs should be pursued through solution manufacturing. Herein, we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid (CF3SO3H). Through a low-concentration and low-temperature CF3SO3H doping, the conducting polymer anodes exhibited a main sheet resistance of 35 Ω sq−1 (minimum value: 32 Ω sq−1), a raised work function (≈ 5.0 eV), a superior wettability, and a high electrical stability. The high work function minimized the energy level mismatch among the anodes, hole-transporting layers and electron-donors of the active layers, thereby leading to an enhanced carrier extraction. The solution-processed flexible OSCs yielded a record-high efficiency of 16.41% (maximum value: 16.61%). Besides, the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85 °C, demonstrating a high flexibility and a good thermal stability.

scholarly journals High-efficiency inverted polymer solar cells with solution-processed metal oxides

2011 ◽  
Vol 95 (8) ◽  
pp. 2511-2515 ◽  
Author(s):  
Yu-Hong Lin ◽  
Po-Ching Yang ◽  
Jing-Shun Huang ◽  
Guo-Dong Huang ◽  
Ing-Jye Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Metal Oxides ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Solution Processed ◽  
Inverted Polymer Solar Cells

High efficiency hybrid PEDOT:PSS/nanostructured silicon Schottky junction solar cells by doping-free rear contact

2015 ◽  
Vol 8 (1) ◽  
pp. 297-302 ◽  
Author(s):  
Yunfang Zhang ◽  
Wei Cui ◽  
Yawen Zhu ◽  
Fengshuo Zu ◽  
Liangsheng Liao ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Schottky Junction ◽  
Solution Processed ◽  
Nanostructured Silicon ◽  
Nanostructured Si

An excellent PCE of 13.7% has been achieved by inserting a solution processed Cs2CO3 layer between nanostructured Si and Al.

scholarly journals Hole Transfer Layer Engineering for CdTe Nanocrystal Photovoltaics with Improved Efficiency

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1348 ◽  
Author(s):  
Yasi Jiang ◽  
Yiyang Pan ◽  
Wanhua Wu ◽  
Kaiying Luo ◽  
Zhitao Rong ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Annealing Temperature ◽  
Transfer Layer ◽  
Inverted Structure ◽  
Solution Processed ◽  
Hole Transfer ◽  
Carrier Recombination ◽  
Cdte Nanocrystal ◽  
Contact Electrode

Interface engineering has led to significant progress in solution-processed CdTe nanocrystal (NC) solar cells in recent years. High performance solar cells can be fabricated by introducing a hole transfer layer (HTL) between CdTe and a back contact electrode to reduce carrier recombination by forming interfacial dipole effect at the interface. Here, we report the usage of a commercial product 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (Spiro) as a hole transfer layer to facilitate the hole collecting for CdTe nanocrystal solar cells. It is found that heat treatment on the hole transfer layer has significant influence on the NC solar cells performance. The Jsc, Voc, and power conversion efficiency (PCE) of NC solar cells are simultaneously increased due to the decreased contact resistance and enhanced built-in electric field. We demonstrate solar cells that achieve a high PCE of 8.34% for solution-processed CdTe NC solar cells with an inverted structure by further optimizing the HTL annealing temperature, which is among the highest value in CdTe NC solar cells with the inverted structure.

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