Thiolated Carbon Nanotubes/CdSe Quantum Dot Based Hybrid Solar Cells with Improved Long-Term Stability

Nano Hybrids ◽  
2015 ◽  
Vol 9 ◽  
pp. 7-14 ◽  
Author(s):  
Alfian Ferdiansyah Madsuha ◽  
Chuyen Van Pham ◽  
Michael Krueger

In this work, the development of room-temperature solution-processed hybrid solar cells based on carbon nanotubes (CNT) - CdSe quantum dot (QD) hybrid material incorporated into a layer of conjugated polymer poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)], PCPDTBT, has been demonstrated. Incorporation of multi walled CNTs helps to improve the long-term efficiency of the solar cells in respect of power conversion efficiency (PCE) and short-circuit current density (Jsc) compared to QD only based devices. For the formation of the hybrid material hexadecylamine (HDA)/ trioctylphosphine oxide (TOPO) capped CdSe QDs were attached to CNTs by engineering the interface between CNTs and CdSe QDs by introducing thiol functional groups to CNTs. Initial PCE values of about 1.9 % under AM1.5G illumination have been achieved for this hybrid CNT-CdSe photovoltaic device. Furthermore, the long term stability of the photovoltaic performance of the devices was investigated and found superior to CdSe QD only based devices. About 90 % of the original PCE remained after storage in a glove box for almost one year without any further encapsulation. It is assumed that the improvement is mainly due to the thiol-functionalization of the CNT interface leading to a strong binding of CdSe QDs and a resulting preservation of the nanomorphology of the hybrid film over time.

ACS Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 653-664 ◽  
Author(s):  
Mahyar Mohammadnezhad ◽  
Gurpreet Singh Selopal ◽  
Zhiming M. Wang ◽  
Barry Stansfield ◽  
Haiguang Zhao ◽  
...  

2018 ◽  
Vol 929 ◽  
pp. 150-157
Author(s):  
Alfian Ferdiansyah Madsuha ◽  
Nofrijon Sofyan ◽  
Akhmad Herman Yuwono ◽  
Michael Krueger

In this work, the development of solution-processed bulk heterojunction hybrid solar cells based on CdSe quantum dot (QD) and conjugated polymer poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)], PCPDTBT was performed. The photoactive layer was formed by integrating CdSe QDs onto multiwalled carbon nanotubes (CNTs). A simple method of thiol functionalization in the interface CNTs and CdSe QDs has been investigated. Integration of CNTs enhances long-term performance of solar cells devices. Initial PCE values of about 1.9 % under AM1.5G illumination have been achieved for this hybrid CNT-CdSe photovoltaic device. In addition, the long-term stability of the photovoltaic performance of the devices was investigated and found superior to CdSe QD only based devices. About 84 % of the initial PCE remained after storage in a glove box for one year without any further encapsulation. It is concluded that the improvement is mainly due to a strong binding between thiol functionalized CNTs and CdSe QDs, resulting preservation of the nanomorphology of the hybrid film over time.


2014 ◽  
Vol 1070-1072 ◽  
pp. 620-624
Author(s):  
Rong Bin Ye ◽  
Manami Yanagida ◽  
Koji Ohta ◽  
Mamoru Baba

This article reports on photovoltaic performance and long-term stability of hybrid solar cells based on ZnO/TiOPc with DH-α6T as an electron blocking layer. When the thermal annealing temperature (TA) was increased from 120 °C to 180 °C, these absorption spectra of TiOPc thin films reveal the gradual formation of the crystalline α-phase, as evidenced by the development of a red-shifted absorption band, peaking 845 nm, and the corresponding reduction of the 720 nm amorphous phase peak. Device performance of hybrid solar cells could be improved and open-circuit voltage (VOC), short-circuit current (ISC) and power conversion efficiency (η) were enhanced by thermal annealing, which originated from amorphous TiOPc films transformed into crystalline α-TiOPc films with a wider red and near-IR absorption band. At TA= 150 °C, the device achieved the highest performance with VOC, ISCand η of 0.53 V, 1.71 mA/cm2, and 0.29 %, respectively. Furthermore, the hybrid device showed long-term stability that this device maintained over 55 % of its initial η after 300 days aging at room temperature.


2016 ◽  
Vol 72 (15) ◽  
pp. 1-8
Author(s):  
A. Hayakawa ◽  
M. Yukawa ◽  
T. Sagawa

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49614-49622 ◽  
Author(s):  
Yong Zhang ◽  
Yawen Liu ◽  
Lie Chen ◽  
Xiaotian Hu ◽  
Lin Zhang ◽  
...  

Introducing GONR/CNTs into solution processed PSCs as an ETL and a HTL simultaneously delivers a high performance with long-term stability.


Solar Energy ◽  
2021 ◽  
Vol 218 ◽  
pp. 28-34
Author(s):  
Mahmoud Samadpour ◽  
Mahsa Heydari ◽  
Mahdi Mohammadi ◽  
Parisa Parand ◽  
Nima Taghavinia

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