In this work, we show that trap-assisted recombination loss of photocurrent is universally present under operational conditions in a wide variety of organic solar cell materials including the new non-fullerene electron acceptor systems currently breaking all efficiency records.
Wetzelaer et al. (2011) oppose the trap-assisted recombination. In organic bulk heterojunction solar cells, a deviation of the ideality factor of the dark current from unity is commonly put forward as evidence for the presence of trap-assisted recombination.
Focus should be directed toward passivation of traps at interfaces (HTL/perovskite and perovskite/ETL) where trap-assisted recombination dominates, while the use of polycrystalline perovskite films with fused GBs as absorber is good enough to achieve high-performance solar cells.
Wetzelaer et al. presented an elegant steady-state method to probe bimolecular recombination in organic solar cells at high forward bias. By comparing current densities in a blend in hole-only, electron-only, and double-carrier diodes, charge recombination can be calculated for every voltage and temperature.
Trap-assisted recombination, despite being lower as compared with traditional inorganic solar cells, is still the dominant recombination mechanism in perovskite solar cells (PSCs) and limits their ...
On the other hand, solar cells with noncompact morphologies (open GBs, high trap density) are sensitive to the sign of the traps and hence to the cell preparation methods. Even in the presence of traps at GBs, trap-assisted recombination at interfaces (between the transport layers and the perovskite) is the dominant loss mechanism.
Advanced spectroscopic techniques for characterizing defects in ...
The development and study of perovskite solar cells is a contemporary area due to their favorable characteristics such as tunable bandgap, high absorption coefficient, low …
Recombination in Perovskite Solar Cells: Significance of Grain ...
compared with traditional inorganic solar cells, is still the dominant recombination mechanism in perovskite solar cells (PSCs) and limits their efficiency. We investigate the attributes of the …
Operando dynamics of trapped carriers in perovskite solar cells ...
defect formation11.However, many carriers still become immobilised, particularly at interfacial states and eventually contribute to trap-assisted non-radiative recombination, decreasing the …
Trap-assisted recombination in disordered organic …
Understanding recombination processes in organic semiconductors is fundamental in modeling solar cells and lighting diodes. However, recognition on …
Recombination in Perovskite Solar Cells: Significance …
Trap-assisted recombination, despite being lower as compared with traditional inorganic solar cells, is still the dominant recombination …
Trap State Induced Recombination Effects on Indoor …
The trap states and the induced recombination in OPV cells are critically relevant to the photovoltaic performance but remain ambiguous in OPV cells for indoor application. Here, we investigate the trap effects on the indoor …
Reduction of recombination at the interface of perovskite and …
The study of charge transfer in thin film solar cells made of several layers is of high importance since they may lose their energy via the recombination process at the …
Suppressing non-radiative recombination for efficient and stable ...
Perovskite solar cells (PSCs) have emerged as prominent contenders in photovoltaic technologies, reaching a certified efficiency of 26.7%. Nevertheless, the current record …
Energy & Environmental Science
recombination would allow for far greater Fermi level splitting and V OCs compared to the rapid trap mediated recombination where the trapped carriers recombine almost instantaneously …
Optimization & enhancement of KGeCl 3 -based perovskite solar cells ...
Higher defect density introduces more structural imperfections, creating additional traps for charge carriers, which enhances recombination rates according to …
Non-Radiative Carrier Recombination Enhanced by Two-Level
Non-radiative recombination plays an important role in the performance of optoelectronic semiconductor devices such as solar cells and light-emitting diodes. Most …
The role of charge recombination to triplet excitons in organic solar cells
In organic solar cells, the recombination of free charges proceeds via the formation of charge-transfer excitons, with an electron on the acceptor material and a hole on …
Investigation into Device Optimisation of Organic Solar Cells …
Figure 2.9: J-V characteristic curves of an ideal solar cell … _____22 Figure 2.10: J-V and P-V curves for an ideal solar cell under illumination … _____23 Figure 2.11: Equivalent circuit …
(PDF) The real TiO 2 /HTM interface of solid-state dye solar cells ...
A fundamental event in dye-sensitized solar cells is the recombination of photoinjected electrons with acceptor species (ionic holes) in the electrolyte phase surrounding the nanoparticles. ...
Trap‐Assisted Charge Generation and Recombination …
Wetzelaer et al. presented an elegant steady-state method to probe bimolecular recombination in organic solar cells at high forward bias. By comparing current densities in a blend in hole-only, electron-only, and double-carrier diodes, …
Meaning of reaction orders in polymer:fullerene solar cells
solar cells where geminate recombination of excitons or bound charge carriers can be a substantial loss mechanism.1,2 However, ... trapped hole, the reaction order would be 1, …
Operando dynamics of trapped carriers in perovskite solar cells ...
real-time dynamics of trapped carriers within operando perovskite solar cells. We compare behaviour differences of trapped holes in pristine and surface-passivated FA 0.99Cs 0.01PbI 3 …
Carriers Trapping and Recombination: the Role of Defect Physics …
The emission bands centered around 480, 545, 580, 670 and 750 nm are possibly attributed to localized states and levels of density defects in the band gap: acting as …
Device deficiency and degradation diagnosis model of Perovskite solar ...
Hysteresis behavior is a unique and significant feature of perovskite solar cells (PSCs), which is due to the slow dynamics of mobile ions inside the perovskite film …
Modeling Nongeminate Recombination in P3HT:PCBM Solar Cells
By introducing tail states into a continuum drift diffusion model, we are able to self-consistently reproduce the experimental voltage-dependent carrier concentration, the current–voltage …
Direct observation of trap-assisted recombination in organic ...
In this work, we show that trap-assisted recombination loss of photocurrent is universally present under operational conditions in a wide variety of organic solar cell materials …
Influence of nanoparticle shape on charge transport …
A key consideration for the efficient operation of hybrid solar cells based upon conjugated polymers and inorganic semiconductor nanocrystals is charge transport in the nanocrystal phase. ... are rapidly built up, favouring …
Operando dynamics of trapped carriers in perovskite solar cells ...
A metal electrode (80-nm Au) was finally deposited through thermal evaporation method under a vacuum degree higher than 3 × 10 ‒6 Torr to accomplish the solar cell …