Global Organization
Open-circuit voltage (V OC) in organic solar cells (OSCs) is currently still not well-understood. A generally acceptable view is that V OC is mainly determined by the energy level offset between donor and acceptor materials. Recently in ternary blend OSCs, V OC is found to be dependent on the blend composition.
The external quantum efficiency (EQE) of the solar cells was observed using CEP-25RR Bunkoukeiki. The Eg values of the absorbers of the thin-film solar cells were then estimated from the first EQE derivative [ 13, 22 ]. The V OC,def was calculated by VOC,def = Eg /q - VOC.
It is known that the EU has the influence on the carrier mobility and lifetime, affecting cell performances [1, 20, 21 ], and open-circuit deficit ( VOC,def) of thin-film solar cells [ 22, 23 ]. The VOC,def is determined by Eg /q - VOC, and managed by the carrier recombination and the absorber quality [ 22, 23 ].
In addition, the relation between the JSC and EU of the thin-film solar cells is not clearly shown since the JSC is mainly influenced by the Eg of the thin-film absorbers. On the other hand, the EU has the significant impact on the VOC (or VOC,def) and FF, where the reduced EU yields the increases in the VOC (or reduced VOC,def) and FF.
The EU of over 20 meV, observed in the CIGS, CTS, CTGS, SnS, and CZTSSe solar cells, gives rise to the high VOC,def and the low conversion efficiency ( η) values. The EU of below 20 meV, seen in the CIGSe, CIGSSe, PVK, and CdTe solar cells, leads to the low VOC,def and high η values.
Urbach energy ( EU) is estimated from external quantum efficiency. Relation between VOC,def and EU is investigated among thin-film solar cells. Decrease in EU decreases VOC,def, thus increasing conversion efficiency. EU of below 20 meV is of importance to realize high photovoltaic performances.
DOI: 10.1016/J.SOLMAT.2008.09.022 Corpus ID: 97883185; Origin of the open-circuit voltage of organic thin-film solar cells based on conjugated polymers @article{Yamanari2009OriginOT, …
Open-circuit voltage (V OC) in organic solar cells (OSCs) is currently still not well-understood. A generally acceptable view is that V OC is mainly determined by the energy …
In this work, improved solar cells from aqueous CdTe NCs is achieved by replacing evaporated MoOx with spiro-OMeTAD as a hole transfer layer. The increased Voc and Jsc can be …
Sb 2 Se 3 as a promising photovoltaic absorber material is attracting increasing attention. However, high open-circuit voltage (V OC) loss, especially for superstrate structured …
Previously published data1 on the open circuit voltage and short circuit current, for a series of solar cells with thicknesses ranging from 1000 Å to 200,000 Å, is analyzed using a detailed …
Organic solar cells, despite their high power conversion efficiencies, suffer from open circuit voltage losses making them less appealing in terms of applications. Here, the …
In this work, the CTS, CTGS, and SnS thin-film solar cells on soda-lime glass (SLG) substrates, which are promising as the eco-friendly thin-film solar cells with earth …
Antimony selenide (Sb 2 Se 3) is a potential absorber material for environment-friendly and cost-efficient photovoltaics and has achieved considerable progress in recent …
In this work, the CTS, CTGS, and SnS thin-film solar cells on soda-lime glass (SLG) substrates, which are promising as the eco-friendly thin-film solar cells with earth …
Nevertheless, the serious open-circuit voltage (V OC) loss issue in WBG perovskite systems restricts the development of high-performance solar cells. Based on …
In this work, we fabricated ITO/CdS/Sb2Se3/Au thin film solar cell using VTD method for Sb 2 Se 3 deposition. First, we optimized the deposition condition to obtain highly crystalline,
Nevertheless, the serious open-circuit voltage (V OC) loss issue in WBG perovskite systems restricts the development of high-performance solar cells. Based on …
This study reports on substantial improvement of the open-circuit voltage (V oc) of Cu 2 ZnSnSe 4 (CZTSe) thin film solar cells by applying a passivation strategy to both the …
This study reports on substantial improvement of the open-circuit voltage (V oc) of Cu 2 ZnSnSe 4 (CZTSe) thin film solar cells by applying a passivation strategy to both the …
This paper presents reasons behind the need for i-ZnO layer and also the effect of its thickness on the open circuit voltage of the CIGS2 based thin film solar cells. It was …
This paper presents reasons behind the need for i-ZnO layer and also the effect of its thickness on the open circuit voltage of the CIGS2 based thin film solar cells. It was …
This model is used to fit the J − V characteristics of several donor-acceptor combinations commonly used in thin film organic photovoltaic cells. In combination with …
Abstract: It is a customary in the preparation of CuIn 1-x Ga x Se 2 (CIGS) or CuIn 1-x Ga x S 2 (CIGS2) solar cells, to use an un-doped layer of ZnO (i-ZnO) on the CdS …
Previously published data1 on the open circuit voltage and short circuit current, for a series of solar cells with thicknesses ranging from 1000 Å to 200,000 Å, is analyzed using a detailed …
Open-circuit voltage (V OC) in organic solar cells (OSCs) is currently still not well-understood. A generally acceptable view is that V OC is mainly determined by the energy …
In this work, improved solar cells from aqueous CdTe NCs is achieved by replacing evaporated MoOx with spiro-OMeTAD as a hole transfer layer. The increased Voc and Jsc can be …
Shuo Chen, Muhammad Ishaq, Wei Xiong, Usman Ali Shah, Umar Farooq, et al.. Improved Open-Circuit Voltage of Sb2Se3 Thin-Film Solar Cells Via Interfacial Sulfur Diffusion-Induced …
Interfaces in Sb 2 S 3 thin-film solar cells strongly affect their open-circuit voltage (V OC) and power conversion efficiency (PCE) nding an effective method of …
Correlation between Urbach energy (E U) and open-circuit voltage deficit (V OC,def) among conventional as well as emerging thin-film solar cells, i.e. Cu(In,Ga)Se 2 …
Regarding the other photovoltaic parameters, the open-circuit voltage (V OC) remains controversial. In this study, we investigated the relation between the V OC and the …
In this work, we fabricated ITO/CdS/Sb2Se3/Au thin film solar cell using VTD method for Sb 2 Se 3 deposition. First, we optimized the deposition condition to obtain highly crystalline,