Impact of metastable defect structures on carrier recombination in solar cells† arXiv:2202.12212v1 [cond-mat.mtrl-sci] 24 Feb 2022 Seán R. Kavanagh,∗a,b David O. Scanlon,a Aron Walsha,c and Christoph Freysoldtd The efficiency of a solar cell is often limited by
The electrical characteristics of InGaP n + /p/p +, solar cells are unstable under illumination below typically 200 K. We show that this effect is metastable. We demonstrate using capacitance and current–voltage measurements coupled with deep level transient spectroscopy that this metastability is a result of the presence of DX centers, associated with the donor …
DOI: 10.1016/j.apsadv.2023.100539 Corpus ID: 266155252; Metastable defect curing by alkaline earth metal in chalcogenide thin-film solar cells @article{Lee2024MetastableDC, title={Metastable defect curing by alkaline earth metal in chalcogenide thin-film solar cells}, author={Woo‐Jung Lee and Dae‐Hyung Cho and Myeong Eon Kim and Kwangsik Jeong and Tae Ha Hwang and Woo …
The organic solar cell (OSC) is a promising emerging low-cost thin film photovoltaics technology. The power conversion efficiency (PCE) of OSCs has overpassed 16% for single junction and 17% for organic–organic tandem solar cells with the development of low bandgap organic materials synthesis and device processing technology.
Light-soaking exposes the solar cell to illumination, which converts metastable defects from donor to acceptor configuration. The increase in n CV depends on the light intensity (Figure 3b ), but not on the light duration (Figure S7, Supporting Information), indicating that the metastable defects reached equilibrium for the light-soaking conditions used here.
20 · Controlling crystal growth alignment in low-dimensional perovskites (LDPs) for solar cells has been a persistent challenge, especially for low-n LDPs (n < 3, n is the number of octahedral sheets ...
The thin-film photovoltaic (PV) material Cu(In,Ga)Se 2 (CIGS) has recently achieved a power conversion efficiency of 22.6% for small-area solar cells 1.
To achieve a high fill factor, a small diode factor close to 1 is essential. The optical diode factor determined by photoluminescence is the diode factor from the neutral zone of the solar cell and thus a lower bound for the diode factor. Due to metastable defects transitions, the optical diode factor is higher than 1 even at low excitation. Here, the influence of the …
The impact of these metastable defects depends on the competing charge capture rates (dashed red/blue arrows), the relative energies of and transition barriers between ground and metastable configurations (i.e. their accessibility) (solid black arrows) and the defect energy level position in the host band gap ().Each of the charge capture transitions can be fast or slow, with no …
Solar cells fabricated from boron-doped p-type Czochralski silicon suffer from light-induced degradation that can lower the conversion efficiency by up to 10% relative. When solar cells are exposed to temperatures between 100 °C and 200 °C under illumination, regeneration, in which the minority carrier lifetime is gradually recovered, occurs after the initial …
We have differentiated between the metastable effect due to the changes of the space-charge distribution in ... Se2-based heterojunction thin-film solar cells. A metastable increase of net ...
The scalable technology by blade-coated solar cells for the designed DJ perovskites (nominal n = 5) achieves a maximum stabilized power conversion efficiency (PCE) of 19.11% under an environmental ...
Here, the authors reveal the degradation pathway, introduce water-insoluble compact layer to suppress α-phase collapse, and achieve maximum efficiency over 25% for …
Perovskite solar cells have made significant strides in recent years. However, there are still challenges in terms of photoelectric conversion efficiency and long-term stability associated with perovskite solar cells. The presence of defects in perovskite materials is one of the important influencing factors leading to subpar film quality. Adopting additives to passivate …
Several metastable effects have been observed in chalcopyrite solar cells. Recently, they have been related to the amphoteric behavior of the Se vacancy. We give an independent experimental evidence on this amphoteric behavior. By comparing charge carrier densities obtained from Hall effect measurements under illumination and in the dark, we …
Then, the modulation of polaron states in PSCs, including large polaron stabilization, polaron-facilitated charge transport, hot-carrier solar cells, and polaron-related …
The efficiency of a solar cell is often limited by electron-hole recombination mediated by defect states within the band gap of the photovoltaic (PV) semiconductor.
Solar cells fabricated from boron-doped p-type Czochralski silicon suffer from light-induced degradation that can lower the conversion efficiency by up to 10% relative.
Wei, Y. et al. Precursor effects on methylamine gas-induced CH 3 NH 3 PbI 3 films for stable carbon-based perovskite solar cells. Sol. Energy 174, 139–148 (2018).
The electrical characteristics of InGaP n + /p/p +, solar cells are unstable under illumination below typically 200. K.. We show that this effect is metastable. We demonstrate using capacitance and current–voltage measurements coupled with deep level transient spectroscopy that this metastability is a result of the presence of DX centers, associated with the donor …
The solar cell showed PCE of 4.69% versus 0.15% and visible transparency of 35.4% versus 81.7% in its perovskite and non-perovskite states, respectively. Over 85% of its …
Cu(In,Ga)Se2-based solar cells exceed power conversion efficiencies of 23%. However, the fill factor of these solar cells, with best values around 80%, is relatively low (Si reaches 84.9%) mostly ...
The defects in Cu (In,Ga)Se$ {}_ {2}$ (CIGS) are known to be metastable: With excitation they change character, which can have a profound impact on device function. The …
Effects of Voltage-Bias Annealing on Metastable Defect Populations in CIGS and CZTSe Solar Cells. 2169-2173. Paper presented at 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, Portland, United States.
Impact of metastable defect structures on carrier recombination in solar cells† Seán R. Kavanagh,a;b David O. Scanlon,a Aron Walsha;c and Christoph Freysoldtd The efficiency of a solar cell is often limited by electron-hole recombination mediated by defect states within the band gap of the photovoltaic (PV) semiconductor.
The perovskite solar cells using a DMPS treatment achieve an increase in power conversion efficiency to 23.27% with high stability, maintaining 92.5% of initial efficiency at 30% relative humidity for 1,000 h. ... Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells. ... Impact of Dipole Effect on Perovskite ...
the observed metastable effects is to perform numerical simulations. Several attempts have been undertaken to mimic the effect of such lattice relaxations by introducing additional charge in a specified region of the absorber layer.11,12 Different metastable states are then modeled by changing the width of this region.
In each case, methods are presented for characterizing parasitic effects common in these solar cells in order to identify loss mechanisms and reveal fundamental device properties. Differences between these thin-film solar cells and idealized devices are largely due to a high density of defect states in the absorbing layers and to parasitic ...
The Cu(In,Ga)Se 2 (CIGS) solar cells were fabricated with a Zn(O,S) buffer layer via chemical bath deposition method (CBD) using different thiourea (TU) mole concentration. The solar cells showed a substantial increment in the performance after light soaking treatment for 1 h. The performance increment was found to be in proportion to the TU mole concentration used in …
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We show a rational design strategy to maximize the out-of-plane hole transport based on a metastable Dion-Jacobson (DJ) 2D perovskite surface layer with a reduced transport energy barrier by using asymmetric …
Abstract Silicon heterojunction (SHJ) solar modules gained strong interest from solar photovoltaic (PV) module manufacturers and in the global market due to their high-efficiency potential. However, the presence of an amorphous silicon layer in SHJ structures raises concerns about their stability under light exposure. In this article, we compare the stability of SHJ …
Similar observations were made on the CIGSe solar cell reference. This effect comes from a considerable reduction of the series resistance (RS) of the dark and light J–V, as determined using the ...
Grading and metastable effects in admittance spectroscopy of CIGS-based solar cells Abstract: Cu(In, Ga)Se 2 -based (CIGS) solar cells have achieved efficiencies up to 20%. Despite these excellent results, the understanding of the underlying mechanisms and the influence of defects on their performance is still incomplete.
Grading and metastable effects in admittance spectroscopy of CIGS-based solar cells Abstract: Cu(In, Ga)Se 2-based (CIGS) solar cells have achieved efficiencies up to 20%. Despite these excellent results, the understanding of the underlying mechanisms and the influence of defects on their performance is still incomplete. The determination of ...
Metastability effects have been investigated in high efficiency MZO/CdSeTe/CdTe solar cells. Different preconditioning procedures have been studied that are used to recover the performance of the devices. J-V characteristics before preconditioning have shown an `S` shaped behaviour which is removed during preconditioning. However, this …
1 Introduction. Many semiconductors used as absorbers in solar cells contain defects that show metastable behavior. [1-7] A prominent mechanism of such metastable transition is the transformation of donor states (acceptor states) into acceptor states (donor states) upon electron capture (release). []This transformation can result in an additional shift of the …
The drive-level capacitance profiling technique has been applied to ZnO/CdS/CuIn1−xGaxSe2/Mo solar cell devices, in order to study properties of defects in the CuIn1−xGaxSe2 film. Properties studied include the spatial uniformity, bulk defect response, carrier density, and light-induced metastable effects. These results indicate that previous …
DOI: 10.1016/j.apsadv.2023.100539 Corpus ID: 266155252 Metastable defect curing by alkaline earth metal in chalcogenide thin-film solar cells @article{Lee2024MetastableDC, title={Metastable defect curing by alkaline earth metal in chalcogenide thin-film solar cells}, author={Woo‐Jung Lee and Dae‐Hyung Cho and Myeong Eon Kim and Kwangsik Jeong and Tae Ha Hwang and Woo …
Metastability effects have been investigated in high efficiency MZO/CdSeTe/CdTe solar cells. Different preconditioning procedures have been studied that are used to recover the performance of the devices. J-V characteristics before preconditioning have shown an `S` shaped behaviour which is removed during preconditioning. However, this recovery remained only for 3 days …
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