Simultaneous improvement of efficiency and stability of inverted organic solar cell<i>via</i>composite hole transport layer

Huang, Qikai; Jing, Jianhua; Zhang, Kai; Chen, Yanwei; Song, Ao; Liu, Zixian; Huang, Fei

doi:10.1039/d2ta07022g

Cited by 23 publications

(14 citation statements)

References 61 publications

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“…[49] The ideal factor n for OSCs of structure A and structure D is 1.27 and 1.12, respectively, which indicates that the device with structure D has weak bimolecular recombination and suppressed trap-assisted recombination, accounting for the improvement of FF. [48,50] This result is consistent with the previous results, proving the advantage of the bulk contact electrode-interface structure in full-solutionprocessed cells.…”

Section: Structure A)supporting

confidence: 92%

“…Based on the power law J SC ∝ I α , the value of α represents the degree of bimolecular recombination. [ 48 ] The α value of structure D (0.933) is slightly higher than that of structure A (0.929), indicating that the bulk contact structure can slightly suppress the bimolecular recombination. Meanwhile, the light intensity dependence of V OC is illustrated in Figure 4e.…”

Section: Resultsmentioning

confidence: 99%

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Bulk Contact Between Silver Nanowires Top Electrode and Interface Layer Enables High Performance of Full‐Solution‐Processed Semitransparent Organic Solar Cell Module

et al. 2023

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The solution‐processed electrode is key to the full‐solution‐processed organic solar cells (OSCs). Silver nanowires (AgNWs) are considered as an attractive solution‐processed electrode due to their low sheet resistance and high transmittance. However, the traditional “line‐plane” contact between AgNWs and the interface buffer layer is insufficient, resulting in the low performance of full‐solution‐processed OSCs. Herein, a bulk contact structure is reported between AgNWs and interface, formed by inserting the interface layer material, such as HMoOx (hydrogen molybdenum bronze) into the AgNWs networks. The extra HMoOx can be connected with the bottom interface buffer layer, forming a longitudinal network, and wrapping the AgNWs in the longitudinal interfacial layer. This bulk contact electrode‐interface structure increases the area of AgNWs/interface layers, promoting charge transfer and collection. Besides, the top‐injected method can enable the formation of a water‐based ink film on the top of the organic layer, as well as avoid solvent erosion between AgNWs and the interface layer. Based on the bulk contact electrode‐interface structure, this work realized high performance of 12.27% and 9.54% for 0.09 cm2 small‐area device and 10.8 cm2 full‐solution‐processed semitransparent mini‐module. These results provide a new idea for full‐solution‐processed OSCs preparation.

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Section: Structure A)supporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Bulk Contact Between Silver Nanowires Top Electrode and Interface Layer Enables High Performance of Full‐Solution‐Processed Semitransparent Organic Solar Cell Module

et al. 2023

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“…The champion OSCs were made from PM6:L8-BO BHJ blends, displaying an excellent PCE of 18.87% ( V oc of 0.88 V, J sc of 26.96 mA cm −2 , FF of 79.70%) with I-MoO x HTLs, which is also superior to that based on PEDOT:PSS HTLs with the PCE of 18.26% ( V oc of 0.88 V, J sc of 26.22 mA cm −2 , FF of 79.42%). It represented the best-performing OSCs containing all-metal oxide charge transport layers so far 52–55 (Fig. 5e and Table S11†).…”

Section: Resultsmentioning

confidence: 98%

Efficient and stable organic solar cells based on all-solution-processed metal oxide transport layers

Tao,

Wang,

et al. 2023

J. Mater. Chem. A

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“…The C −2 −V plot yields a straight line under low voltage and the intercept with the voltage axis represents the built‐in voltage ( V bi ). [ 49 ] V bi for LBL‐O‐XY:CS 2 , LBL‐CF, and LBL‐CB devices were 0.96, 0.95, and 0.96 V, respectively (Figure S10 and Table S5, Supporting Information). Shallower trap states and lower number of trap states are conducive to enhancing charge transmission, reducing the probability of recombination and the loss of photocurrent.…”

Section: Resultsmentioning

confidence: 99%

High‐Efficiency Layer‐by‐Layer All‐Polymer Solar Cell Enabled by Bottom‐Layer Optimization

Dou,

Hong,

Jing

et al. 2023

Solar RRL

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All‐polymer solar cells (all‐PSCs) have attracted extensive attention for their advantages in long‐term thermal‐ and photostability. However, the power conversion efficiencies (PCEs) of all‐PSCs still lag behind organic solar cells based on small‐molecular acceptors. The long‐chain entanglement between polymers brings complex morphological problems, which contribute to lower fill factor (FF). Herein, an effective approach is proposed to build the ideal morphology and pseudo‐p–i–n vertical component distribution in all‐polymer active layer by independently casting donor and acceptor films with different solvents. Through the solvent engineering, the layer‐by‐layer device with o‐xylene and carbon disulfide (O‐XY:CS2)‐processed D18 donor layer achieves a PCE of 17.53%, much higher than commonly used solvents (chloroform and chlorobenzene) processed donor layers with PCEs of 16.49 and 16.04%, respectively. In‐depth investigation reveals that outstanding performance of O‐XY:CS2‐processed donor layer device is attributed to mitigated bimolecular recombination, more balanced mobility, and reduced trap density of states, which contribute to the enhancement of short‐current density and FF. Moreover, favorable morphology network also brings prolonged lifetime under continuous light soaking. This work presents a simple and effective way to obtain ideal active layer morphology and construct favorable vertical component distribution through optimizing donor morphology in all‐PSCs.

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Simultaneous improvement of efficiency and stability of inverted organic solar cellviacomposite hole transport layer

Abstract: It is generally believed that the inverted structure is more beneficial for constructing highly stable organic solar cells (OSCs), but the power conversion efficiency (PCE) of current inverted OSCs lag...

Cited by 23 publications

References 61 publications

Bulk Contact Between Silver Nanowires Top Electrode and Interface Layer Enables High Performance of Full‐Solution‐Processed Semitransparent Organic Solar Cell Module

Bulk Contact Between Silver Nanowires Top Electrode and Interface Layer Enables High Performance of Full‐Solution‐Processed Semitransparent Organic Solar Cell Module

Efficient and stable organic solar cells based on all-solution-processed metal oxide transport layers

High‐Efficiency Layer‐by‐Layer All‐Polymer Solar Cell Enabled by Bottom‐Layer Optimization

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