We have investigated the magnetic field effect on the current in bulk heterojunction polymer solar cells made of blends of an anthracene-containing poly(arylene-ethynylene)-alt-poly (arylene-vinylene) (AnE-PVstat) and fullerene molecules prepared in various ratios (1:1, 1:2, 1:3 and 1:4) and different applied voltages ranging from 0.7 to 0.95 V in steps of 0.05 V. The efficiencies and fill factors of the resulting devices improved upon increasing the PCBM content. The highest efficiency obtained was 2.7% for the device prepared using 75% PCBM. The measured magnetoconductance (MC) is positive and monotonic over the full range of the blend ratios and applied voltages studied. We analyzed the MC effect using a magnetoconductance model controlled by interconversion of the singlet and triplet (MIST) electron-hole (e-h) pairs states based on density matrix formalism using the stochastic Liouville equation considering that the singlet and triplet e-h pairs have different recombination and dissociation rates to theoretically reproduce the line shape of MC. For all the applied voltages studied, the recombination and dissociation rates of the e-h pairs on the singlet and triplet states decreased upon increasing the fullerene content until it reached a maximum with a PCBM content of 75 wt%. After this PCBM content, the rates started to increase. However, for each blend ratio, the recombination and dissociation rates of the singlet and triplet e-h pairs increase when the voltage is increased.

我们已经研究了磁场对整体异质结聚合物太阳能电池中电流的影响，该异质结聚合物太阳能电池由含蒽的聚（亚芳基-亚乙炔基）-alt-聚（亚芳基-亚乙烯基）（AnE-PVstat）和富勒烯分子的混合物制成。比率（1：1、1：2、1：3和1：4）和从0.7到0.95 V的不同施加电压（以0.05 V为步长）。随着PCBM含量的增加，所得器件的效率和填充因数得到改善。对于使用75％PCBM制备的器件，获得的最高效率为2.7％。在所研究的混合比和施加电压的整个范围内，测得的磁导（MC）为正且单调的。考虑到单重态和三重态eh对具有不同的重组，我们基于磁矩阵模型分析了MC效应，该模型由基于密度矩阵形式论的单重态和三重态（MIST）电子-空穴（eh）对状态互转换控制。解离速率可从理论上重现MC的线形。对于所研究的所有施加电压，随着富勒烯含量的增加，eh对在单重态和三重态上的重组和解离速率降低，直至达到最大水平（PCBM含量为75 wt％）。在此PCBM含量之后，费率开始增加。然而，对于每个混合比，当电压增加时，单重态和三重态eh对的重组和解离速率也会增加。