Realization of high performance for PM6:Y6 based organic photovoltaic cells

Low nonradiative energy losses within 0.2 eV in efficient non-fullerene all-small-molecule organic solar cells

“…Previous research studies have shown that the open-circuit voltage ( V OC ) is usually proportional to the difference between the highest occupied molecular orbital (HOMO) of the donor and the lowest unoccupied molecular orbital (LUMO) of the acceptor. Taking acceptor Y6 as an example, the famous polymer donor PM6, with the HOMO energy level of −5.53 eV, exhibits a V OC of 0.835 when blended with Y6, 31 while small molecule donor ZR1, with a higher HOMO of −5.32 eV, was reported to give a higher V OC of 0.861 eV, 32 which conflicts with the previous empirical conclusion. Since energy loss is approximately the difference between the band-gap and V OC of the blend, small molecule donors may possess the potential to reach lower energy loss under a similar energetic offset when compared with polymers.…”

Coordination‐Induced Defects Elimination of SnO2 Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells

“…Huaizhi Gao, Xueqi Wei, Runnan Yu, Fong-Yi Cao, Yongshuai Gong, Zongwen Ma, Yen-Ju Cheng,* Chain-Shu Hsu,* and Zhan'ao Tan* DOI: 10.1002/adom.202102031 engineering and molecular designing, the power conversion efficiency (PCE) of OSC has significantly enhanced to over 18%. [5][6][7][8][9] To enhance the stability of OSCs, inverted structure was developed and now the PCE has exceeded 17%. [10][11][12] Since the OSCs are photoactive layer sandwiched between electron transport layer (ETL) and hole transport layer, the interfaces play a critical role in improving device performance because the interface layers can enhance the ohmic contact between the electrode and the photosensitive layer, reducing charge recombination and promoting charge transport and collection.…”

Efficient Organic Tandem Solar Cells Enabled by Solution‐Processed Interconnection Layer and Fine‐Tuned Active Layer

“…Rui Zeng, Runnan Yu, Shengli Jin, Shan Jiang, Chao Zou, Siqian Hu, and Zhan'ao Tan* DOI: 10.1002/adom.202101246 applications in building integrated photo voltaics as semitransparent smart windows and power sources for internet of things related electronic devices. [1][2][3] Stimulated by the designing of novel donor and acceptor materials, controlling the bulk heterojunction morphology, and engi neering the device interfaces, the power conversion efficiency (PCE) of single junction OSCs have reached over 17%. [4][5][6] However, compared with the traditional crystalline silicon and the emerging perov skite solar cells, the PCE of OSCs are still limited by insufficient light absorption and the thermalization photon energy losses.…”